API: app settings in env variable

Makefile.config

@@ -4,6 +4,7 @@ CLIENT_PORT = 3000
 
 export REACT_APP_API_URL = http://$(HOST):$(API_PORT)
 export FLASK_APP = $(PWD)/mpwo_api/server.py
+export APP_SETTINGS=mpwo_api.config.DevelopmentConfig
 export FLASK_DEBUG = 1
 export TEST_URL = http://$(HOST):$(CLIENT_PORT)
 export REQUIREMENTS = $(PWD)/mpwo_api/requirements.txt

mpwo_api/mpwo_api/__init__.py

@@ -1,4 +1,5 @@
 import logging
+import os
 
 from flask import Flask
 from flask_bcrypt import Bcrypt
@@ -17,7 +18,8 @@ def create_app():
 
     # set config
     with app.app_context():
-        app.config.from_object('mpwo_api.config.DevelopmentConfig')
+        app_settings = os.getenv('APP_SETTINGS')
+        app.config.from_object(app_settings)
 
     # set up extensions
     db.init_app(app)

mpwo_api/mpwo_api/config.py

@@ -29,7 +29,7 @@ class DevelopmentConfig(BaseConfig):
 
 
 class TestingConfig(BaseConfig):
-    """Development configuration"""
+    """Testing configuration"""
     DEBUG = True
     TESTING = True
     SQLALCHEMY_DATABASE_URI = \