Splitting the build process into two phases

.github/workflows/publish-to-dockerhub.yml

@@ -14,16 +14,21 @@ jobs:
     runs-on: self-hosted
 
     steps:
+      - uses: actions/checkout@v3
+      - name: Set up Docker
+        uses: docker/setup-buildx-action@v2
       - name: Login to Dockerhub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
-      - uses: actions/checkout@v3
+      - name: Build Bootable JAR
+        run: |
+          docker build -f Dockerfile.build -t builder-image .
+          docker run --rm builder-image > app.jar
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Build and publish Docker image
+      - name: Build and publish Docker image for multiple architectures
         run: |
-          docker buildx build --platform linux/amd64,linux/arm64/v8 -t daithihearn/electricity-prices:latest -t daithihearn/electricity-prices:${{ github.ref_name }} --push .
+          docker buildx build --platform linux/amd64,linux/arm64/v8,linux/arm/v7 -f Dockerfile.deploy -t daithihearn/electricity-prices:latest -t daithihearn/electricity-prices:${{ github.ref_name }} --push .

.version

@@ -1 +1 @@
-1.8.6
+1.8.7

Dockerfile.build

@@ -0,0 +1,18 @@
+FROM eclipse-temurin:17 AS builder
+
+WORKDIR /opt/app
+
+COPY ./gradle ./gradle
+COPY ./gradlew ./
+
+RUN ./gradlew
+
+COPY ./build.gradle.kts ./
+COPY ./settings.gradle ./
+COPY ./system.properties ./
+COPY ./.version ./
+COPY ./src ./src
+
+RUN ./gradlew build publishToMavenLocal
+
+CMD ["cat", "/opt/app/build/libs/electricity-prices*.jar"]

Dockerfile.deploy

@@ -0,0 +1,7 @@
+FROM eclipse-temurin:17
+
+WORKDIR /opt/app
+
+COPY app.jar /opt/app/app.jar
+
+ENTRYPOINT ["java", "-Djdk.tls.client.protocols=TLSv1.2", "-jar", "./app.jar", "-XX:+UseContainerSupport"]