Add GitHub Actions workflow for building mock-login Docker image

Author: oestoer

.github/workflows/build-dev-image.yaml

@@ -0,0 +1,77 @@
+name: Build Mock Login Image
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch: # Manually triggered
+
+env:
+  CONTAINER_REGISTRY: ghcr.io
+  IMAGE_NAME: mock-login
+  BRANCH_NAME: ${{ github.head_ref || github.ref }} 
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: 📦 Checkout code
+      uses: actions/checkout@v4
+
+    - name: 🧰 Get branch name
+      run: | # Get the branch name from the ref and replace non-alphanumeric characters with hyphens
+        BRANCH=$(echo "${BRANCH_NAME#refs/heads/}" | sed -e 's/[^a-zA-Z0-9]/-/g')
+        echo "BRANCH=$BRANCH" >> $GITHUB_ENV
+
+    - name: 🏷️ Generate Docker metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: |
+          ${{ env.CONTAINER_REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=ref,event=branch,priority=610
+          type=ref,event=pr
+          type=semver,pattern={{raw}}
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+          type=semver,pattern=v{{major}}
+          type=sha,format=long
+          type=raw,value=latest,enable={{is_default_branch}}
+          type=raw,value=${{ env.BRANCH_NAME }},priority=10
+        annotations: |
+          runnumber=${{ github.run_id }}
+          sha=${{ github.sha }}
+          ref=${{ github.ref }}
+
+    - name: 🔐 Log in to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.CONTAINER_REGISTRY }}
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: 🛠️ Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: 🚀 Build and push image
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        file: Dockerfile
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        annotations: ${{ steps.meta.outputs.annotations }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max