adding database with stable previous version

.circleci/config.yml

@@ -42,6 +42,22 @@ jobs:
           key: yarn-packages-v2{{ checksum "yarn.lock" }}
           paths:
             - ./node_modules
+  database:
+    docker:
+      - image: circleci/postgres:9.6.2-alpine
+        environment:
+          POSTGRES_USER: psqluser
+          POSTGRES_PASSWORD: psqlpassword
+          POSTGRES_DB: psdb
+    steps:
+      - checkout
+      - run: 
+          command: yarn test:e2e
+          environment:
+            DATABASE_URL: postgres://$POSTGRES_USER@localhost:5432/$POSTGRES_DB
+            API_PORT: 3000
+            API_HOST: localhost
+            API_PROTOCOL: http
 workflows:
   build_and_test:
     jobs:
@@ -52,6 +68,9 @@ workflows:
       - unit-test:
           requires:
             - build
+      - database:
+          requires:
+            - build