[test] chore: adding github action for contract test

.github/workflows/backend-contract-tests.yml

@@ -0,0 +1,59 @@
+name: Backend Contract Tests
+
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - "backend/**"
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - "backend/**"
+
+defaults:
+  run:
+    working-directory: ./backend
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      API_URL: http://localhost:5000
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Use Node.js 18.x
+      uses: actions/setup-node@v3
+      with:
+        node-version: 18.x
+
+    - name: Create .env file
+      run: |
+        echo "JWT_SECRET=${{ secrets.JWT_SECRET }}" > .env
+        echo "CONTRACT_TEST_AUTH_TOKEN=${{ secrets.CONTRACT_TEST_AUTH_TOKEN }}" >> .env
+
+    - name: Start service in docker
+      run: |
+        npm run docker:up
+
+    - name: Wait for service to start
+      run: |
+          sleep 15
+
+    - name: Print application logs
+      run: docker-compose logs
+
+    - name: Test connectivity
+      run: curl ${API_URL}
+
+    - name: Run Service Tests
+      run: |
+        npm ci
+        npm run test:scontract
+
+    - name: Stop service in docker
+      run: |
+        npm run docker:down