added dockerhub release (#4)

Author: Avi-Robusta

.github/workflows/release.yaml

@@ -66,12 +66,19 @@ jobs:
         poetry install --no-dev
         poetry publish --build -u __token__ -p ${{ secrets.PYPI_PROJECT_TOKEN }}
 
+    - name: Login to Docker Hub
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
     - name: Release Docker CLI
       if: "!github.event.release.prerelease"
       run: |-
         docker buildx build \
         --platform linux/arm64,linux/amd64 \
         --tag us-central1-docker.pkg.dev/genuine-flight-317411/devel/robusta-cli:${{env.RELEASE_VER}} \
+        --tag robustadev/robusta-cli:${{env.RELEASE_VER}} \
         --tag us-central1-docker.pkg.dev/genuine-flight-317411/devel/robusta-cli \
         --push \
         --file Dockerfile \
@@ -85,4 +92,4 @@ jobs:
         --tag us-central1-docker.pkg.dev/genuine-flight-317411/devel/robusta-cli:${{env.RELEASE_VER}} \
         --push \
         --file Dockerfile \
-        .
+        .