Add push step to workflow

.github/workflows/pr.yml

@@ -5,16 +5,47 @@ env:
   SECRET_KEY: insecure_test_key
 
 jobs:
-  run-image:
+  imaging:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - id: commit
+        uses: prompt/actions-commit-hash@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build image
-        run: DOCKER_BUILDKIT=1 docker build --tag dqlite-io .
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          load: true
+          push: false
+          tags: ghcr.io/canonical/dqlite.io:${{ steps.commit.outputs.short }}
       - name: Run image
         run: |
-          docker run -d -p 80:80 --env SECRET_KEY=insecure_secret_key dqlite-io
+          docker run -d -p 80:80 --env SECRET_KEY=insecure_secret_key ghcr.io/canonical/dqlite.io:${{ steps.commit.outputs.short }}
           sleep 1 && curl --head --fail --retry-delay 5 --retry 10 --retry-connrefused http://localhost
+      - name: Push image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ghcr.io/canonical/dqlite.io:${{ steps.commit.outputs.short }}
+
+  login:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
   run-dotrun:
     runs-on: ubuntu-latest