feat: Add Flask server with /cast POST route and logging

main.py

@@ -1,11 +1,20 @@
 import os, logging
+from flask import Flask, request
+
 DEBUG = os.environ.get('DEBUG')
 logging.basicConfig(
         format='[%(asctime)s] %(levelname)s %(module)s/%(funcName)s - %(message)s',
         level=logging.DEBUG if DEBUG else logging.INFO)
 
+app = Flask(__name__)
+
+@app.route('/cast', methods=['POST'])
+def cast_spell():
+    logging.info(f"Received POST request on /cast. Request data: {request.data}")
+    return "Cast successful!", 200
+
 def main():
-    pass
+    app.run(debug=DEBUG, host='0.0.0.0', port=int(os.environ.get('PORT', 5000)))
 
 if __name__ == '__main__':
     main()