Separate package with the uwsgi entry point

Dockerfile

@@ -27,4 +27,4 @@ RUN cd /tmp/wheels \
 
 ENV VIRTUALENV=/virtualenv
 ENV UWSGI_ENGINE=threads
-ENV WSGI_APP=mat_api_server.api:create_app
+ENV WSGI_APP=mat_api_server.wsgi:application

mat_api_server/api.py

@@ -9,14 +9,6 @@ import tempfile
 app = Flask(__name__)
 
 
-def create_app():
-    # Simple config from environment variables.
-    app.config.update({
-        'UPLOAD_DIR': os.getenv('UPLOAD_DIR'),
-    })
-    return app
-
-
 def get_parser_by_mime_type(path, mime_type):
     for parser_class in parser_factory._get_parsers():
         if mime_type in parser_class.mimetypes:

mat_api_server/wsgi.py

+import os
+from .api import app
+
+
+# Simple config from environment variables.
+app.config.update({
+    'UPLOAD_DIR': os.getenv('UPLOAD_DIR'),
+})
+
+
+application = app