Add github action to build docker images

Author: mehr74

.github/workflows/docker-build-images.yaml

@@ -0,0 +1,45 @@
+name: Docker build images
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  AWS_REGION: eu-central-1
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        image: [ 'grafana', 'postgres' ]
+    steps:
+    - uses: actions/checkout@v4
+ 
+    - name: Set AWS credentials
+      uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: arn:aws:iam::615677714887:role/postgres-grafana-on-ecs-role
+        aws-region: ${{ env.AWS_REGION }}
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+    
+    - name: Login to Amazon ECR
+      id: login-ecr
+      uses: aws-actions/amazon-ecr-login@v2
+    
+    - name: Build, tag, and push docker image to Amazon ECR
+      uses: docker/build-push-action@v5
+      with:
+        context: ./src/grafana
+        push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        tags: 615677714887.dkr.ecr.eu-central-1.amazonaws.com/postgres-grafana-on-ecs-${{ matrix.image }}-repo
+        cache-from: type=gha
+        cache-to: type=gha,mode=max