fix(save): allow to save larger datasets

> fix #288

The payload size limit is now configiurable via the envionment variable `PAYLOAD_SIZE_LIMIT`.

apps/backend/.env.example

@@ -1,3 +1,5 @@
+PAYLOAD_SIZE_LIMIT=20mb
+
 # DATABASE
 POSTGRES_USER=docker
 POSTGRES_PASSWORD=docker

apps/backend/src/environment.d.ts

@@ -0,0 +1,25 @@
+declare global {
+  namespace NodeJS {
+    interface ProcessEnv {
+      /**
+       * Controls the maximum request body size. If this is a number,
+       * then the value specifies the number of bytes; if it is a string,
+       * the value is passed to the bytes library for parsing. Defaults to '15mb'.
+       */
+      PAYLOAD_SIZE_LIMIT?: string;
+      NODE_ENV?: 'development' | 'production' | string;
+      PORT?: string;
+      ADMIN_EMAIL: string;
+      ADMIN_PASSWORD: string;
+      DUMMY_EDITOR_EMAIL: string;
+      DUMMY_EDITOR_PASSWORD: string;
+      POSTGRES_HOST?: string;
+      POSTGRES_PORT?: string;
+      POSTGRES_USER?: string;
+      POSTGRES_PASSWORD?: string;
+      POSTGRES_DATABASE?: string;
+    }
+  }
+}
+
+export {};

apps/backend/src/main.ts

@@ -26,8 +26,8 @@ async function bootstrap() {
       transform: true,
     })
   );
-  app.use(bodyParser.json({ limit: '10mb' }));
-  app.use(bodyParser.urlencoded({ limit: '10mb', extended: true }));
+  app.use(bodyParser.json({ limit: process.env.PAYLOAD_SIZE_LIMIT || '15mb' }));
+  app.use(bodyParser.urlencoded({ limit: process.env.PAYLOAD_SIZE_LIMIT || '15mb', extended: true }));
 
   await app.get(MikroORM).getSchemaGenerator().ensureDatabase();
   await app.get(MikroORM).getSchemaGenerator().updateSchema();