Deploy

Goal

This snapshot advances Tidepool Notes by teaching you to prepare Tidepool Notes for Fly.io and managed Postgres.

Every numbered folder is a complete app. Run this stage independently, then compare it with the previous folder.

Prerequisites

Use Node.js 20+, npm, and a terminal. You should recognize React components, TypeScript modules, and HTTP verbs.

Port 3004 must be free. Copy .env.example before starting database stages.

• Node.js and npm
• A code editor and terminal
• Docker from part 4 onward

Concepts

Production needs HTTPS-only cookies, a strong SESSION_SECRET, and environment-only database URLs. Fly.io runs the Remix server build with a managed Postgres attachment.

Keep the server boundary visible: Remix loaders read trusted data on the server; actions must validate input and re-check authorization before mutations.

Walkthrough

Review DEPLOY.md and fly.toml; set DATABASE_URL and SESSION_SECRET in Fly secrets; never commit .env.

Read the example, then open the matching snapshot. The repository includes the surrounding setup and error handling.

SESSION_HTTPS_ONLY=true
APP_URL=https://your-app.fly.dev

Run and verify

Enter 12-Deploy, install dependencies, copy .env.example when present, and start Remix on port 3004.

Open http://127.0.0.1:3004. Watch the terminal for validation and database errors.

docker compose -f ../docker-compose.yml up -d
git clone https://github.com/michaeldunga1/fcc-remix-blog.git
cd fcc-remix-blog/12-Deploy
npm install
cp .env.example .env
npm run db:push
npm run db:seed
npm run dev

Troubleshooting

If sessions vanish after deploy, check HTTPS-only cookie settings behind the Fly proxy.

Missing-module errors usually mean npm install ran in another snapshot. For Postgres failures, confirm Docker and the tidepool_NN database name.

• Read the first error first
• Restart after environment changes
• Never commit .env or node_modules

Try this

List every secret that must live only in the host environment.

Test a happy path and one invalid or unauthorized request.

• Make one small change
• Test it in the browser
• Compare with the next snapshot only after it works