Minimal Flask app ready for Vercel

This repository contains a tiny Flask + Jinja app packaged as a Vercel Python serverless function.

Files:

• api/index.py - Flask WSGI app entrypoint used by Vercel
• templates/index.html - Jinja2 template rendered by Flask
• requirements.txt - Python dependencies
• vercel.json - Vercel configuration

Quick local run (Windows PowerShell):

# create venv
python -m venv .venv
.\.venv\Scripts\Activate.ps1
pip install -r requirements.txt
python api/index.py

Deploy to Vercel (recommended):

1. Install the Vercel CLI: npm i -g vercel or use the web UI.
2. From the project root run:

vercel login
vercel --prod

Vercel will detect the vercel.json and use the @vercel/python runtime to deploy api/index.py.

Test locally (once the app is running):

# From a separate PowerShell window
curl http://127.0.0.1:5000/

Persistence note

The editor saves files to a local saved_files/ directory in the project. This works for local development and persistent servers. However, Vercel and other serverless providers use ephemeral file systems: files written at runtime are not guaranteed to persist across invocations, builds, or deployments.

If you need persistent storage in production, consider:

• Using an object store (S3, Cloud Storage) for files
• Using a simple database (SQLite on a persistent volume, PostgreSQL)
• Using Vercel KV or another key-value service for small items

If you'd like, I can add a SQLite backend or an example that saves to S3/Vercel KV and update the UI accordingly.