Added code to read environemnt from a file

If file does not exist default to live config.

wsgi.py

@@ -1,9 +1,17 @@
 from app import create_app
 from credstash import getAllSecrets
+import os
+
+config = 'live'
+default_env_file = '/home/ubuntu/environment'
+
+if os.path.isfile(default_env_file):
+        environment = open(default_env_file, 'r')
+        config = environment.readline().strip()
 
 secrets = getAllSecrets(region="eu-west-1")
 
-application = create_app('live', secrets)
+application = create_app(config, secrets)
 
 if __name__ == "__main__":
         application.run()