Version is 0-SNAPSHOT since determined by release tag name

Release is now better and uses cache
Dockerfile builds it all as required by GitHub Action

.github/workflows/release.yaml

@@ -7,8 +7,8 @@ on:
       - '*' # Push events to matching *, i.e. 1.0, 20.15.10
 
 jobs:
-  build:
-    name: Release Binaries
+  release-github:
+    name: Publish Binaries to GitHub Release
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -37,10 +37,23 @@ jobs:
           file_glob: true
           tag: ${{ github.ref }}
           overwrite: true
+
+  release-docker:
+    name: Release Docker image to DockerHub
+    runs-on: ubuntu-latest
+    needs: [release-github]
+    steps:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
@@ -51,6 +64,8 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           push: true
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
           tags: |
              logzio/jmx2graphite:latest
              logzio/jmx2graphite:${{ steps.determine-version.outputs.VERSION }}

.gitignore

@@ -1,7 +1,3 @@
 jmx2graphite.iml
 .idea/
-/target/
-.gradle/
-gradlew
-gradlew.bat
-gradle/
+/target/

Dockerfile

@@ -1,10 +1,16 @@
+FROM maven:3.6.3-jdk-8-slim AS build
+RUN mkdir -p /workspace
+WORKDIR /workspace
+COPY pom.xml /workspace
+COPY src /workspace/src
+RUN mvn -B -f pom.xml clean package -DskipTests
+
 FROM openjdk:8u121-alpine
 
 MAINTAINER Asaf Mesika <[email protected]>
 
 RUN apk add --no-cache --update bash curl vim
-
-ADD target/jmx2graphite-*-javaagent.jar /jmx2graphite.jar
+COPY --from=build /workspace/target/jmx2graphite-*-javaagent.jar /jmx2graphite.jar
 ADD slf4j-simple-1.7.25.jar /slf4j-simple-1.7.25.jar
 ADD application.conf /application.conf
 # Default Start

pom.xml

@@ -6,7 +6,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>io.logz</groupId>
     <artifactId>jmx2graphite</artifactId>
-    <version>1.4.4</version>
+    <version>0-SNAPSHOT</version>
 
     <build>
         <plugins>