Add GitHub Actions workflow for Docker image release on tag push

Signed-off-by: Teresa Romero <romero.teresa@protonmail.com>

Author: teresaromero

.github/workflows/release.yml

@@ -0,0 +1,35 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "[0-9]+.[0-9]+"
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract tag name
+        id: tag
+        run: echo "TAG=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/${{ github.event.repository.name }}:${{ steps.tag.outputs.TAG }}
+            ${{ secrets.DOCKERHUB_USERNAME }}/${{ github.event.repository.name }}:latest