CI: Implement a publish action to push Docker images

Signed-off-by: HarshCasper <[email protected]>

.github/workflows/ci.yml

@@ -3,8 +3,6 @@
 name: Continuous Integration
 
 on:
-  push:
-    branches: [ main, master ]
   pull_request:
     branches: [ main, master ]
   workflow_dispatch:

.github/workflows/publish.yml

@@ -0,0 +1,51 @@
+name: Taswira CD
+
+on:
+  schedule:
+    - cron: "0 0 * * MON"
+
+  push:
+    branches: [ master ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build:
+    name: Build and publish Taswira
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log into GitHub Container Registry
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/moja-global/taswira
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max