1.1 Install dotenv
1.2 Add custom-environment-variables.ts
2.1 Add env_file to docker-compose
2.2 Configure Caddyfile
2.3 Create build script
3.1 Push code to GitHub
3.2 Create DigitalOcean droplet
3.3 Configure domain
3.4 Install git on droplet `apt-get update && apt-get install git`
3.5 Pull repository
3.6 Build and deploy
4.1 Deploy UI on Vercel