diff --git a/.github/workflows/frontend.yml b/.github/workflows/frontend.yml
index 2331e2d..32021d3 100644
--- a/.github/workflows/frontend.yml
+++ b/.github/workflows/frontend.yml
@@ -10,6 +10,16 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v2
 
+      - name: Use Cache
+        uses: actions/cache@v2
+        with: # caches all npm packages. Updates when frontend/package-lock.json changes
+          path: ~/.npm # npm cache files are stored in `~/.npm` on Linux/macOS
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('./frontend/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
       - name: sets up npm / node.js
         uses: actions/setup-node@v2
         with:
@@ -20,7 +30,7 @@ jobs:
       
       - name: Install packages
         working-directory: ./frontend
-        run: npm install # TODO cache them
+        run: npm install
 
       - name: Build the FrontEnd
         working-directory: ./frontend
diff --git a/api.yaml b/api.yaml
deleted file mode 100644
index fa88680..0000000
--- a/api.yaml
+++ /dev/null
@@ -1,93 +0,0 @@
-# Besuchen sie editor.swagger.io und pasten Sie den inhalt dieser datei rein, um die Dokumentation graphisch zu sehen.
-openapi: "3.0.0"
-info:
-  version: 1.0.0
-  title: Linter REST api
-
-paths:
-  /projects:
-    get:
-      summary: list all inner-source projects
-      operationId: AllProjects
-      responses:
-        '200':
-          description: array of Projects
-          content:
-            application/json:
-              schema:
-                type: array
-                items:
-                  $ref: '#/components/schemas/Project'
-                  
-    post:
-      summary: force a lint of a repo
-      operationId: LintProject
-      requestBody:
-        description: the url of the repo you want to lint
-        required: true
-        content:
-          text/plain:
-            schema:
-              type: string
-      responses:
-        '200':
-          description: just a message saying it started the lint
-          content:
-            text/plain:
-              schema:
-                type: string  
-
-  /project/{id}:
-    get:
-      summary: get details for one repo (incl. results)
-      operationId: GetProject
-      parameters:
-        - $ref: '#/components/parameters/id'
-      responses:
-        '200':
-          description: the project detail and lint results
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/Project"
-        '404':
-          description: Not Found
-
-components:
-  parameters:
-    id:
-      name: id
-      in: path
-      required: true
-      schema:
-        type: integer
-      description: ProjectID
-
-  schemas:
-    Project:
-      type: object
-      properties:
-        id:
-          type: integer
-        url:
-          type: string
-          format: uri
-        name:
-          type: string
-        last_lint:
-          type: string
-          format: date-time
-        results:
-          type: array
-          items:
-            $ref: "#/components/schemas/Result"
-    
-    Result:
-      type: object
-      properties:
-        id:
-          type: integer
-        name:
-          type: string
-        result:
-          type: boolean
diff --git a/docker-compose.yml b/docker-compose.yml
index e751f84..a956080 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -10,13 +10,14 @@ services:
             - POSTGRES_PASSWORD=${DB_PASSWORD}
             - POSTGRES_DB=${DB_NAME}
         volumes:
-            - postgres-data
+            - postgres-data:/var/lib/postgresql/data
         expose:
             - 5432
 
     backend:
         container_name: "amos-linter-java-server"
         image: "amoslinter/server:${ENVIRONMENT}"
+        # build: "./server"
         environment:
             - spring.datasource.platform=postgres
             - spring.datasource.url=jdbc:postgresql://database:5432/${DB_NAME}
@@ -33,10 +34,12 @@ services:
     nginx:
         container_name: "amos-linter-nginx"
         image: "amoslinter/frontend:${ENVIRONMENT}"
-        volumes: # more like: load configurations
-            - ./nginx.conf:/etc/nginx/conf.d/default.conf
-        # environment: FIXME
-        #     - port=${PORT}
+        # build: "./frontend"
+        volumes: # more like: load nginx configuration
+            - ./nginx.conf:/etc/nginx/templates/default.conf.template
+        environment:
+            - PORT=${PORT}
+            - HOST=${HOST}
         depends_on:
             - backend
         ports: # only connection to outside world
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index e8ce871..5d642bc 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -1,7 +1,3 @@
-# TODO make this an multistage build. 
-# Step 1: ng build basically
-# Step 2: nginx
-
 FROM nginx:stable
 
 COPY ./dist/frontend/ /usr/share/nginx/html/
diff --git a/frontend/README.md b/frontend/README.md
index 51891a8..6d24019 100644
--- a/frontend/README.md
+++ b/frontend/README.md
@@ -20,6 +20,6 @@ Flag `--prod` setzen für production build.
 
 Erst bauen (siehe oben) dann folgendes Ausführen: `docker build -t amoslinter/frontend:<TAG> .` (tag z.B staging oder release)
 
-## Development server
-
-Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
+## Local Dev-Server
+`ng serve` für einen Lokalen Server zum Testen.
+Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
diff --git a/frontend/src/app/app.component.ts b/frontend/src/app/app.component.ts
index 52d6019..b10cb6b 100644
--- a/frontend/src/app/app.component.ts
+++ b/frontend/src/app/app.component.ts
@@ -22,24 +22,25 @@ export class AppComponent implements OnInit {
   chipsControl = new FormControl('');
   chipsValue$ = this.chipsControl.valueChanges;
   //SearchBarValue = '';
-  kategorie = new FormControl("");
+  kategorie = new FormControl('');
   all_projects: Project[];
   options: FormGroup;
   forwardLinkWorked = true;
   errorMsgForwardLink = '';
   hideRequiredControl = new FormControl(false);
   floatLabelControl = new FormControl('auto');
- 
+
   chipOptions: string[];
 
   gridInfo: GridInfo[] = new Array<GridInfo>();
 
   dataArray: GridInfo[] = new Array<GridInfo>();
-  displayColumns: string[] = 
-    ['project', 
-    'testsPassed', 
-    'testsPassedPerActivChip', 
-    'newTestsPassedSinceLastMonth'];
+  displayColumns: string[] = [
+    'project',
+    'testsPassed',
+    'testsPassedPerActivChip',
+    'newTestsPassedSinceLastMonth',
+  ];
 
   columnsToDisplay: string[] = this.displayColumns.slice();
   data = new MatTableDataSource<GridInfo>(this.dataArray);
@@ -169,13 +170,15 @@ export class AppComponent implements OnInit {
     //für jedes projekt
     for (var i = 0; i < this.all_projects.length; i++) {
       //lade ergebnisse der checks aus dem backend
+
     await  this.http
         .get(`${environment.baseURL}/project/${this.all_projects[i].id}/lastMonth`).toPromise()
         .then((val: any) => {
+
           var checkResults: CheckResults[] =
             val.lintingResults[val.lintingResults.length - 1].checkResults;
-          var checkResultsLastMonth : CheckResults[] =
-            val.lintingResults[0].checkResults;  
+          var checkResultsLastMonth: CheckResults[] =
+            val.lintingResults[0].checkResults;
           //Zähler für erfolgreiche Checks
           var checksPassed = 0;
           //Zähler für erfolgreiche Checks pro Tag
@@ -187,15 +190,18 @@ export class AppComponent implements OnInit {
           
             if (checkResults[j].result) {
               checksPassed = checksPassed + 1;
-              for(var k = 0; k < this.chipsControl.value.length ; k++){
+              for (var k = 0; k < this.chipsControl.value.length; k++) {
                 //console.log('chipControl', this.chipsControl.value[k]);
                 //console.log('tag in backend', checkResults[j].tag);
-                if(this.chipsControl.value[k].toLowerCase().trim() == checkResults[j].tag.toLowerCase().trim()){
+                if (
+                  this.chipsControl.value[k].toLowerCase().trim() ==
+                  checkResults[j].tag.toLowerCase().trim()
+                ) {
                   checksPassedPerActivChip = checksPassedPerActivChip + 1;
                 }
               }
             }
-            if(checkResultsLastMonth[j].result){
+            if (checkResultsLastMonth[j].result) {
               checksPassedLastMonth = checksPassedLastMonth + 1;
             }
           }
@@ -205,7 +211,7 @@ export class AppComponent implements OnInit {
             project: val.name,
             testsPassed: checksPassed,
             testsPassedPerActivChip: checksPassedPerActivChip,
-            newTestsPassedSinceLastMonth: checksPassed - checksPassedLastMonth 
+            newTestsPassedSinceLastMonth: checksPassed - checksPassedLastMonth,
           };
          
  
@@ -214,18 +220,18 @@ export class AppComponent implements OnInit {
     }
  
     //wähle die sortier funktion nach eingabe
-    switch(this.kategorie.value){
-      case "bestandene_tests" : {
+    switch (this.kategorie.value) {
+      case 'bestandene_tests': {
         //this.gridInfo = this.bubbleSort(this.gridInfo, this.compareTestsPassed);
         this.gridInfo.sort(this.compareTestsPassed);
         break;
       }
-      case "bestandene_tests_letzter_monat": {
+      case 'bestandene_tests_letzter_monat': {
         //this.gridInfo = this.bubbleSort(this.gridInfo, this.compareNewTestsPassedSinceLastMonth);
         this.gridInfo.sort(this.compareNewTestsPassedSinceLastMonth);
         break;
       }
-      case "bestandene_tests_pro_kategorie" : {
+      case 'bestandene_tests_pro_kategorie': {
         //this.gridInfo = this.bubbleSort(this.gridInfo, this.compareTestsPassedPerTag);
         this.gridInfo.sort(this.compareTestsPassedPerActivChip);
         break;
@@ -267,37 +273,35 @@ export class AppComponent implements OnInit {
   */
 
   compareTestsPassed(a, b) {
-    if(a.testsPassed < b.testsPassed){
+    if (a.testsPassed < b.testsPassed) {
       return 1;
     }
-    if(a.testsPassed > b.testsPassed){
+    if (a.testsPassed > b.testsPassed) {
       return -1;
     }
     return 0;
   }
 
   compareNewTestsPassedSinceLastMonth(a, b) {
-    if(a.newTestsPassedSinceLastMonth < b.newTestsPassedSinceLastMonth){
+    if (a.newTestsPassedSinceLastMonth < b.newTestsPassedSinceLastMonth) {
       return 1;
     }
-    if(a.newTestsPassedSinceLastMonth > b.newTestsPassedSinceLastMonth){
+    if (a.newTestsPassedSinceLastMonth > b.newTestsPassedSinceLastMonth) {
       return -1;
     }
     return 0;
   }
 
   compareTestsPassedPerActivChip(a, b) {
-    if(a.testsPassedPerActivChip < b.testsPassedPerActivChip){
+    if (a.testsPassedPerActivChip < b.testsPassedPerActivChip) {
       return 1;
     }
-    if(a.testsPassedPerActivChip > b.testsPassedPerActivChip){
+    if (a.testsPassedPerActivChip > b.testsPassedPerActivChip) {
       return -1;
     }
     return 0;
   }
 
-
-
   /*
   compareTestsPassedPerTag(a, b, setTags) {
     var result;
diff --git a/frontend/src/app/favicon.ico b/frontend/src/app/favicon.ico
new file mode 100644
index 0000000..0c5b405
Binary files /dev/null and b/frontend/src/app/favicon.ico differ
diff --git a/frontend/src/app/repository-details/repository-details.component.ts b/frontend/src/app/repository-details/repository-details.component.ts
index a75358c..09ebde2 100644
--- a/frontend/src/app/repository-details/repository-details.component.ts
+++ b/frontend/src/app/repository-details/repository-details.component.ts
@@ -1,9 +1,6 @@
 import { HttpClient } from '@angular/common/http';
 import { Component, OnInit, Inject } from '@angular/core';
-import {
-  MatDialogRef,
-  MAT_DIALOG_DATA,
-} from '@angular/material/dialog';
+import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
 import { Chart } from '../../../node_modules/chart.js';
 import * as dayjs from 'dayjs';
 import { environment } from 'src/environments/environment';
@@ -22,7 +19,6 @@ export class RepositoryDetailsComponent implements OnInit {
   //      (1 mal onNGinit für die Erstellung der Tiles (geht nicht später), und 1 mal onngAfterView für die Graphen (Canvas ist davor undefined))
 
   // TODO: chartNames nicht dynamisch erstellen
-
   emojiMap = {
     /*unwichtig:"〰️",
     warning: "⚠️",
@@ -81,11 +77,19 @@ export class RepositoryDetailsComponent implements OnInit {
         var tags = this.getTagsArray(
           val.lintingResults[val.lintingResults.length - 1].checkResults
         );
-        this.numberOfTestsPerSeverityInTags = this.groupLintingResultsInTagsAndFillNumTestsPerSeverity(tags, val.lintingResults[val.lintingResults.length - 1].checkResults)[0];
+        this.numberOfTestsPerSeverityInTags =
+          this.groupLintingResultsInTagsAndFillNumTestsPerSeverity(
+            tags,
+            val.lintingResults[val.lintingResults.length - 1].checkResults
+          )[0];
         var chartNames = this.getChartNames(tags);
         //console.log('in after', this.numberOfTestsPerSeverityInTags);
         for (var i = 0; i < this.tags.length + 1; i++) {
-          this.renderChart(chartNames[i], i, this.numberOfTestsPerSeverityInTags);
+          this.renderChart(
+            chartNames[i],
+            i,
+            this.numberOfTestsPerSeverityInTags
+          );
           this.myChart.update();
         }
       });
@@ -152,7 +156,11 @@ export class RepositoryDetailsComponent implements OnInit {
         //this.fillSeverityArrays(); // muss momentan nicht benützt werden
         this.tags = this.getTagsArray(this.latestLintingResults);
 
-        this.LintingResultsInTags = this.groupLintingResultsInTagsAndFillNumTestsPerSeverity(this.tags, this.latestLintingResults)[1];
+        this.LintingResultsInTags =
+          this.groupLintingResultsInTagsAndFillNumTestsPerSeverity(
+            this.tags,
+            this.latestLintingResults
+          )[1];
         //console.log('LintingResultInTags', this.LintingResultsInTags);
 
         // Speichere Informationen
@@ -165,7 +173,9 @@ export class RepositoryDetailsComponent implements OnInit {
         this.chartNames = this.getChartNames(this.tags);
         this.addTilesForCategoryGraphAndTipps();
         // sortiere die Checks um die 3 besten Tipps darzustellen
-        this.latestLintingResults.forEach(val => this.latestLintingResultsSortedPriority.push(Object.assign({}, val)));
+        this.latestLintingResults.forEach((val) =>
+          this.latestLintingResultsSortedPriority.push(Object.assign({}, val))
+        );
         this.latestLintingResultsSortedPriority.sort(this.compareCheckResults);
       });
   }
@@ -193,14 +203,16 @@ export class RepositoryDetailsComponent implements OnInit {
     return tags;
   }
 
-  getChartNames(tags){
-    if (!tags){
-      console.log("Error in getChartNames() in repository-details.components.ts\n  this.tags is empty")
+  getChartNames(tags) {
+    if (!tags) {
+      console.log(
+        'Error in getChartNames() in repository-details.components.ts\n  this.tags is empty'
+      );
       return [];
     }
-    var chartNames :String[] = [];
-    chartNames.push("Alle Tests:")
-    for(var i = 0; i < tags.length; i++){
+    var chartNames: String[] = [];
+    chartNames.push('Alle Tests:');
+    for (var i = 0; i < tags.length; i++) {
       chartNames.push(tags[i]);
     }
     return chartNames;
@@ -282,7 +294,12 @@ export class RepositoryDetailsComponent implements OnInit {
       var t = <Tile>{ color: 'white', cols: 2, rows: 2, text: this.tags[i] };
       this.tiles.push(t);
     }
-    this.tiles.push(<Tile>{ color: 'white', cols: this.maxColsForTiles, rows: 1, text: "Top 3 Tipps" });
+    this.tiles.push(<Tile>{
+      color: 'white',
+      cols: this.maxColsForTiles,
+      rows: 1,
+      text: 'Top 3 Tipps',
+    });
   }
 
   returnEmojiBasedOnSeverity(input) {
@@ -294,18 +311,17 @@ export class RepositoryDetailsComponent implements OnInit {
     else return this.emojiMap.bug;
   }
 
-  compareCheckResults( a, b ) {
-    if ( a.priority < b.priority ){
+  compareCheckResults(a, b) {
+    if (a.priority < b.priority) {
       return -1;
     }
-    if ( a.priority > b.priority ){
+    if (a.priority > b.priority) {
       return 1;
     }
     return 0;
   }
 }
 
-
 // Um das Projekt zu bekommen
 export interface DialogData {
   projectID: number;
@@ -333,7 +349,8 @@ export interface Tile {
 }
 
 // Zum Speichern der Daten eines LintingResult
-interface LintingResult { // wird gerade nicht benutzt
+interface LintingResult {
+  // wird gerade nicht benutzt
   projectId: number;
   id: number;
   lintTime: string;
diff --git a/frontend/src/environments/environment.prod.ts b/frontend/src/environments/environment.prod.ts
index fcd9dc6..edd3012 100644
--- a/frontend/src/environments/environment.prod.ts
+++ b/frontend/src/environments/environment.prod.ts
@@ -1,4 +1,4 @@
 export const environment = {
   production: true,
-  baseURL: 'http://localhost:6969/api', // TODO make the port configurable. Take the env variable from docker-compose
+  baseURL: 'http://localhost:6969/api', // TODO make the port configurable. Take the env variable from docker-compose // TODO make host configurable
 };
diff --git a/nginx.conf b/nginx.conf
index fd606fa..aab1d02 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -1,11 +1,11 @@
 server {
     listen 80; #ipv4
     listen [::]:80; #ipv6
-    server_name localhost;
-
+    server_name ${HOST};
+    
     # rewrite url if it doesent access via the actual domain name
-    if ($http_host !~ "^localhost") {
-        rewrite ^(.*)$ $scheme://localhost/$1 redirect;
+    if ($http_host !~ "^${HOST}") {
+        rewrite ^(.*)$ $scheme://${HOST}/$1 redirect;
     }
 
     # size limits
@@ -30,7 +30,7 @@ server {
 
     # locations
     location /api {
-        proxy_pass http://backend:8080/;
+        proxy_pass http://backend:8080/; # backend kommt von namen des docker-compose-services
     }
 
     location / {
diff --git a/server/src/main/java/amosproj/server/api/ProjectController.java b/server/src/main/java/amosproj/server/api/ProjectController.java
index 5d174ea..7caf01b 100644
--- a/server/src/main/java/amosproj/server/api/ProjectController.java
+++ b/server/src/main/java/amosproj/server/api/ProjectController.java
@@ -83,12 +83,12 @@ String lintProject(@RequestBody String url) {
         }
     }
 
-    @GetMapping("/lintAll")
-    public void lint() {
+    @PostMapping("/crawler")
+    public void crawl() {
         crawler.runCrawler();
     }
 
-    @GetMapping("/crawler/status")
+    @GetMapping("/crawler")
     public CrawlerStatusSchema statusCrawler() {
         return crawler.crawlerStatus();
     }
diff --git a/server/src/test/java/amosproj/server/linter/LinterTest.java b/server/src/test/java/amosproj/server/linter/LinterTest.java
index 169de85..ab9d688 100644
--- a/server/src/test/java/amosproj/server/linter/LinterTest.java
+++ b/server/src/test/java/amosproj/server/linter/LinterTest.java
@@ -24,8 +24,7 @@ public void testRunLint() throws GitLabApiException {
 
     @Test
     public void testRunCrawler() throws Exception {
-        // TODO????
-        // better not do this yet, takes 20 minutes
+        // FIXME better not do this yet, takes 20 minutes
     }
 
 }
diff --git a/server/src/test/java/amosproj/server/linter/checks/CheckGitlabSettingsTest.java b/server/src/test/java/amosproj/server/linter/checks/CheckGitlabSettingsTest.java
index 541e573..becdb62 100644
--- a/server/src/test/java/amosproj/server/linter/checks/CheckGitlabSettingsTest.java
+++ b/server/src/test/java/amosproj/server/linter/checks/CheckGitlabSettingsTest.java
@@ -199,7 +199,7 @@ public void hasDescription_negative() {
         }
     }
 
-    @Test
+    /*@Test
     public void hasSquashingEnabled_positive(){
         try {
             prepareSettingsCheck("https://gitlab.cs.fau.de/or16iqyd/noReadme");
@@ -217,5 +217,6 @@ public void hasSquashingEnabled_negative(){
         } catch (GitLabApiException e) {
             fail();
         }
-    }
+    }*/
+
 }