Add postgres service for the e2e test

Signed-off-by: Jim Zhang <jim.zhang@kaleido.io>

.github/workflows/e2e.yaml

@@ -10,6 +10,20 @@ on:
 jobs:
   integration-test:
     runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_PASSWORD: my-secret
+          POSTGRES_USER: postgres
+          POSTGRES_DB: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
     steps:
       - name: Install circom
         uses: supplypike/setup-bin@v4