Set up the bones of a Flask app with configuration

src/main.py

@@ -1,3 +1,35 @@
 #!/usr/bin/env python
 
-print('hello, world!')
+from waitress import serve
+from flask import Flask
+import argparse
+import logging
+
+from src.config import parse_config, DEFAULT_CONFIG, Config
+
+logger = logging.getLogger(__name__)
+
+
+def create_app(name: str, config: Config) -> Flask:
+    logging.basicConfig(level=config.logging.level, format=('%(asctime)s %(levelname)s [%(name)s] %(message)s'))
+
+    app = Flask(name)
+
+    if config.host:
+        app.config['SERVER_NAME'] = config.host
+
+    return app
+
+
+def main():
+    parser = argparse.ArgumentParser('Cereal', description='run the Cereal server')
+    parser.add_argument('--config', '-c', help='The path to the configuration file, expects JSON')
+    args = parser.parse_args()
+    config = parse_config(args.config) if args.config else DEFAULT_CONFIG
+    app = create_app('Cereal', config)
+    logger.info(str(config))
+    serve(app, host='0.0.0.0' if config.host is None else config.host, port=config.port)
+
+
+if __name__ == '__main__':
+    main()