app.py

import os
from flask import Flask, send_from_directory, jsonify

# Serve React build output
app = Flask(
    __name__,
    static_folder=os.path.join("frontend", "dist", "assets"),
    static_url_path="/assets",
)

BUILD_DIR = os.path.join(os.path.dirname(__file__), "frontend", "dist")


@app.route("/api/hello")
def hello():
    return jsonify({"message": "Hello from Flask!"})


# Catch-all: serve React's index.html for client-side routing
@app.route("/", defaults={"path": ""})
@app.route("/<path:path>")
def serve_react(path):
    file_path = os.path.join(BUILD_DIR, path)
    if path and os.path.isfile(file_path):
        return send_from_directory(BUILD_DIR, path)
    return send_from_directory(BUILD_DIR, "index.html")


if __name__ == "__main__":
    app.run(debug=True, port=5000)