Push sarthi image on release to GH packages

.github/workflows/release.yml

@@ -0,0 +1,44 @@
+name: Release Docker Image
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Convert repository name to lowercase
+        run: echo "REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
+
+      - name: Get release tag name
+        id: vars
+        run: echo "RELEASE_TAG=$(echo ${{ github.event.release.tag_name }} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: |
+            ghcr.io/${{ env.REPOSITORY }}/sarthi:latest
+            ghcr.io/${{ env.REPOSITORY }}/sarthi:${{ env.RELEASE_TAG }}