Deploy Fullstack Vercel

sed -i 's|<script type="module"|<script src="vellum-shim.js"></script>\n<script type="module"|' dist/index.html

cd /workspace/data/apps/<app-name>/dist

{
  "rewrites": [
    {
      "source": "/((?!main\\.js|main\\.css|vellum-shim\\.js|assets/).*)",
      "destination": "/index.html"
    }
  ]
}

cd <project>/frontend
bun install
bunx vite build

<project>/vercel-deploy/
├── api/
│   ├── index.py          ← FastAPI app wrapper (entry point)
│   ├── database.py        ← DB config (use /tmp for SQLite)
│   ├── models.py
│   ├── schemas.py
│   ├── seed_data.py       ← Must seed ALL required data (users, etc.)
│   ├── routers/
│   │   ├── __init__.py
│   │   └── *.py
│   └── requirements.txt   ← Python deps (fastapi, sqlalchemy, pydantic)
├── index.html             ← From frontend/dist/
├── assets/                ← From frontend/dist/assets/
└── vercel.json

mkdir -p <project>/vercel-deploy/api

# Copy frontend build output to deploy root
cp -r <project>/frontend/dist/* <project>/vercel-deploy/

# Copy backend files into api/
cp <project>/backend/models.py <project>/vercel-deploy/api/
cp <project>/backend/database.py <project>/vercel-deploy/api/
cp <project>/backend/schemas.py <project>/vercel-deploy/api/
cp <project>/backend/seed_data.py <project>/vercel-deploy/api/
cp -r <project>/backend/routers <project>/vercel-deploy/api/
cp <project>/backend/requirements.txt <project>/vercel-deploy/api/

import sys, os
sys.path.insert(0, os.path.dirname(__file__))

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from database import engine, Base, SessionLocal
from seed_data import seed_exercises, seed_default_user  # all seed functions
from routers import users, exercises, workouts, schedule, progress

# Create tables and seed on EVERY cold start
Base.metadata.create_all(bind=engine)
db = SessionLocal()
try:
    seed_exercises(db)
    seed_default_user(db)  # IMPORTANT: seed all required data
finally:
    db.close()

app = FastAPI(title="MyApp")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(users.router)
# ... other routers

@app.get("/api/health")
def health_check():
    return {"status": "ok"}

SQLALCHEMY_DATABASE_URL = "sqlite:////tmp/app.db"

def seed_default_user(db: Session):
    count = db.query(UserProfile).count()
    if count > 0:
        return
    user = UserProfile(name="Demo User", ...)
    db.add(user)
    db.commit()

{
  "rewrites": [
    { "source": "/api/(.*)", "destination": "/api/index.py" },
    { "source": "/((?!assets/).*)", "destination": "/index.html" }
  ]
}

cd <project>/vercel-deploy
vercel --yes --prod

curl -s <deployed-url>/api/health
# Should return: {"status":"ok"}

bun install -g vercel        # Install
vercel login                 # Authenticate (opens browser for user-mediated auth)
vercel --yes --prod          # Deploy to production (skip prompts)
vercel logs --project <name> # Check function logs