Add test endpoint to Flask application

app.py

@@ -1,4 +1,4 @@
-from flask import Flask
+from flask import Flask, jsonify
 
 app = Flask(__name__)
 
@@ -6,5 +6,9 @@ app = Flask(__name__)
 def index():
     return "Hello, World!"
 
+@app.route('test')
+def test():
+    return jsonify({"message": "This is a test endpoint!"}), 200
+
 if __name__ == '__main__':
     app.run(debug=True, host='127.0.0.1', port=5050)