ci: postgres service

.github/workflows/pr.yaml

@@ -5,6 +5,24 @@ on:
 jobs:
   pr:
     runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:16-alpine
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+    env:
+      DB_USER: postgres
+      DB_PASS: postgres
+      DB_DATABASE: postgres
+      DB_HOST: localhost
+      DB_PORT: 5432
     steps:
       - uses: actions/checkout@v4
       # Before setup-node because that action runs `yarn cache dir`. See https://github.com/actions/setup-node/issues/480#issuecomment-1915448139
@@ -24,6 +42,8 @@ jobs:
       - name: Build
         run: yarn build
       # TODO: https://github.com/Agoric/agoric-subql/issues/8
+      - name: Enable btree btree_gist
+        run: psql "postgresql://$DB_USER:$DB_PASS@$DB_HOST:$DB_PORT/$DB_DATABASE" -c "CREATE EXTENSION IF NOT EXISTS btree_gist;"
       # - name: Install subql-node-cosmos
       #   run: yarn global add @subql/node-cosmos
       # - name: Run tests with Subquery Node