fix(config.yml):error computing cache key and CircleCI received exit code 127

I resolved these issues:
-error Command failed with exit code 127
-error computing cache key: template: cacheKey unexpected unclosed action in command

.circleci/config.yml

@@ -60,7 +60,7 @@ jobs:
             API_PORT: 3000
             API_HOST: localhost
             API_PROTOCOL: http
-        - image: circleci/postgres:9-postgis-ram
+        - image: circleci/postgres:9.6.2-alpine
           environment:
             POSTGRES_USER: jordan
             POSTGRES_DB: psdb