Deploying to Railway

Railway runs your app as a persistent process. It is recommended for SSE, WebSockets, background workers, and in-memory process state. use_cdn=False (default) works correctly.

Project Structure

my-app/
|-- main.py
|-- requirements.txt
`-- railway.toml

main.py

from fasthtml.common import FastHTML
from faststrap import add_bootstrap

app = FastHTML()
add_bootstrap(app)  # use_cdn=False is fine on Railway

# Expose bare app; Railway uses startCommand

railway.toml

[deploy]
startCommand = "uvicorn main:app --host 0.0.0.0 --port $PORT"

Deploy

npm i -g @railway/cli
railway login
railway init
railway up

Set variables with railway variables set DATABASE_URL=....

SSE on Railway

SSE works with default Railway process hosting. Only add Nginx buffering directives if you place Nginx in front.