added possibility to push image to the registry

Author: khudolii-yevhenii-ew

.github/workflows/docker-image.yml

@@ -1,26 +1,52 @@
-name: Docker Image CI
+name: Charge Point Simulator image release
 
 on:
   push:
     branches: [ "master" ]
   pull_request:
     branches: [ "master" ]
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+  
 jobs:
 
   build:
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      
+    - name: Log in to the Container registry
+      uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+          
     - name: Set up JDK 17
       uses: actions/setup-java@v1
       with:
         java-version: '17'
         distribution: 'adopt'
         cache: maven
+        
     - name: Build with Maven
       run: mvn clean install
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag ocpp-charge-point-emulator-cli:$(date +%s)
+    
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          
+    - name: Build and push Docker image
+      uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}