feat: Create main.yml

.github/workflows/main.yml

@@ -0,0 +1,40 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Log in to the Container registry
+        env:
+          REGISTRY: ghcr.io
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Define date and short SHA
+        id: vars
+        run: |
+          echo "date=$(date +'%Y%m%d.%H%M%S')" >> $GITHUB_OUTPUT
+          echo "short_sha=$(echo ${{ github.sha }} | cut -c 1-7)" >> $GITHUB_OUTPUT
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4ì
+        with:
+          push: true
+          tags: |
+            ghcr.io/relybytes/nginx-certbot:latest
+            ghcr.io/relybytes/nginx-certbot:${{ steps.vars.outputs.date }}-${{ steps.vars.outputs.short_sha }}