🐳 Deploy image to the internal docker registry

* Deploy the image to the internal docker registry
* Removed unnecessary stage in backend build

.github/workflows/publish-backend.yml

@@ -0,0 +1,45 @@
+name: update-saas-backend
+
+# Deploy backend only if push on "main"
+on:
+  push:
+    branches: [main]
+    paths:
+      - "twake/docker/**"
+      - "twake/backend/**"
+      - ".github/workflows/**"
+
+jobs:
+  publish-node:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: "Setup version"
+        run: 'echo "DOCKERTAGVERSION=2023.Q1.1223" >> $GITHUB_ENV'
+      - name: Set env to develop
+        if: endsWith(github.ref, '/develop')
+        run: 'echo "DOCKERTAG=develop" >> $GITHUB_ENV; echo "DOCKERTAGVERSION=2023.Q1.1223" >> $GITHUB_ENV'
+      - name: Set env to develop
+        if: endsWith(github.ref, '/qa')
+        run: 'echo "DOCKERTAG=qa" >> $GITHUB_ENV; echo "DOCKERTAGVERSION=2023.Q1.1223" >> $GITHUB_ENV'
+      - name: Set env to develop
+        if: endsWith(github.ref, '/canary')
+        run: 'echo "DOCKERTAG=canary" >> $GITHUB_ENV; echo "DOCKERTAGVERSION=${{ env.DOCKERTAGVERSION }}-canary" >> $GITHUB_ENV'
+      - name: Set env to production
+        if: endsWith(github.ref, '/main')
+        run: 'echo "DOCKERTAG=latest" >> $GITHUB_ENV'
+      - name: "Push to the registry following labels:"
+        run: |
+          echo "${{ env.DOCKERTAG }},${{ env.DOCKERTAGVERSION }}"
+      - uses: actions/checkout@v2
+      - name: Publish to Registry
+        uses: elgohr/Publish-Docker-Github-Action@v5
+        with:
+          name: tdrive/tdrive-node
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+          workdir: twake
+          registry: docker-registry.linagora.com
+          context: .
+          target: production
+          buildoptions: "-t docker-registry.linagora.com/tdrive/tdrive-node -f docker/tdrive-node/Dockerfile"
+          tags: "${{ env.DOCKERTAG }},${{ env.DOCKERTAGVERSION }}"