Fix environment variables

{{cookiecutter.app_name}}/manage.py

@@ -14,7 +14,7 @@ from {{cookiecutter.app_name}}.database import db
 from {{cookiecutter.app_name}}.settings import DevConfig, ProdConfig
 from {{cookiecutter.app_name}}.user.models import User
 
-if os.environ.get('MYFLASKAPP_ENV') == 'prod':
+if os.environ.get('{{cookiecutter.app_name | upper}}_ENV') == 'prod':
     app = create_app(ProdConfig)
 else:
     app = create_app(DevConfig)

{{cookiecutter.app_name}}/{{cookiecutter.app_name}}/settings.py

@@ -8,7 +8,7 @@ os_env = os.environ
 class Config(object):
     """Base configuration."""
 
-    SECRET_KEY = os_env.get('MYFLASKAPP_SECRET', 'secret-key')  # TODO: Change me
+    SECRET_KEY = os_env.get('{{cookiecutter.app_name | upper}}_SECRET', 'secret-key')  # TODO: Change me
     APP_DIR = os.path.abspath(os.path.dirname(__file__))  # This directory
     PROJECT_ROOT = os.path.abspath(os.path.join(APP_DIR, os.pardir))
     BCRYPT_LOG_ROUNDS = 13