Added docker (refs #1)

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build Docker Image
+
+on:
+  workflow_dispatch:
+    # Manual trigger
+  release:
+    types: [created]
+    # Automatic trigger on release creation
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        push: true
+        platforms: linux/amd64, linux/arm64/v8, linux/arm/v7
+        tags: ghcr.io/marcus7i/statuspage:${{ github.ref_name }},ghcr.io/marcus7i/statuspage:latest