feat: add github cicd

.github/workflows/build-image.yaml

@@ -0,0 +1,43 @@
+name: "Build image and upload to ghcr.io"
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - name: "Docker: Setup Buildx"
+        uses: docker/setup-buildx-action@v2
+
+      - name: "Docker: Login to GitHub Container Registry"
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
+      - name: "Docker: Metadata"
+        id: docker-meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/LiamSho/pg-auto-backup
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=ref,event=pr
+            type=sha
+
+      - name: "Docker: Build and Push Image"
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: ${{ steps.docker-meta.outputs.tags }}
+          labels: ${{ steps.docker-meta.outputs.labels }}