add github workflow to release standalone app

.github/workflows/release-standalone-docker-img.yml

@@ -0,0 +1,47 @@
+name: Release standalone docker image
+on:
+  push:
+    tags:
+      - "infisical-standalone/v*.*.*"
+
+jobs:
+  infisical-standalone:
+    name: Build infisical standalone image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Extract version from tag
+        id: extract_version
+        run: echo "::set-output name=version::${GITHUB_REF_NAME#infisical/}"
+      - name: ☁️ Checkout source
+        uses: actions/checkout@v3
+      - name: 📦 Install dependencies to test all dependencies
+        run: npm ci --only-production
+        working-directory: backend
+      - name: 🧪 Run tests
+        run: npm run test:ci
+        working-directory: backend
+      - name: Save commit hashes for tag
+        id: commit
+        uses: pr-mpt/actions-commit-hash@v2
+      - name: 🔧 Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: 🐋 Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Set up Depot CLI
+        uses: depot/setup-action@v1
+      - name: 📦 Build backend and export to Docker
+        uses: depot/build-push-action@v1
+        with:
+          project: 64mmf0n610
+          token: ${{ secrets.DEPOT_PROJECT_TOKEN }}
+          push: true
+          context: .
+          tags: |
+            infisical/standalone-infisical:${{ steps.commit.outputs.short }}
+            infisical/standalone-infisical:latest
+            infisical/standalone-infisical:${{ steps.extract_version.outputs.version }}
+          platforms: linux/amd64,linux/arm64
+          file: Dockerfile.standalone-infisical