Merge pull request #43 from greenkeeperio/fix/nexus-env-vars

fix(env): set valid empty defaults for nexus vars

Author: hulkoba

lib/env.js

@@ -12,8 +12,8 @@ module.exports = envalid.cleanEnv(process.env, {
   STATSD_HOST: str({default: '172.17.0.1'}),
   BEARER_TOKEN: str({devDefault: 'PIZZA'}),
   IS_ENTERPRISE: bool({default: false}),
-  NEXUS_SECRET: str({devDefault: 'test'}),
-  NEXUS_URL: str({devDefault: 'http://127.0.0.1:8081/repository'}),
-  NEXUS_REPOSITORY: str({devDefault: 'my-npm'}),
-  NEXUS_INSTALLATION: str({devDefault: '1'})
+  NEXUS_SECRET: str({devDefault: 'test', default: ''}),
+  NEXUS_URL: str({devDefault: 'http://127.0.0.1:8081/repository', default: ''}),
+  NEXUS_REPOSITORY: str({devDefault: 'my-npm', default: ''}),
+  NEXUS_INSTALLATION: str({devDefault: '1', default: ''})
 })