Use an in memory .env file by exporting vars

Author: kudapara

.travis.yml

@@ -1,3 +1,15 @@
 language: node_js
 node_js:
-  - "6.11.0"
+  - "6.11.0"
+  
+services:
+  - postgresql
+addons:
+  postgresql: "9.5"
+
+before_script:
+  - psql -c 'create database travis_ci_test;' -U postgres
+  - mkdir config && cp database.travis.yml config/database.yml
+  - export TEST_DATABASE_URL="postgres://postgres:test_password@localhost:5432/travis_ci_test"
+  - export JWT_SECRET="some-super-secure-secret-i-will-never-use-in-production"
+  - export PORT="3000"