How to deploy a nodejs app in a DigitalOcean droplet?

• ecosystem.config.js: PM2 monitoring config
• index.js: Nodejs Express web app that says "Hello World"
• setup.sh: Executable that copy and launch the install script in the droplet using SSH
• install.sh: Install the dependencies on the server

Deploy

# go in the project dir
cd ../path/to/this/folder

# make the script executable
chmod +x ./setup.sh

# Deploy
./setup.sh {droplet_ip}
# eg: ./setup.sh 157.245.78.51

Managing

Running new bots in the same droplet and monitor it could be done using pm2 (ready to use in the droplet console).

The bot is build to work with the --no-autorestart flag. Indeed, in case of minor issues, we just send a error message then try the next step. But in case of major error, could be come with automatized trading bots, we want to completely stop the bot.

# Example commands:
# start a bot
pm2 start index.js --name bot --no-autorestart
    # Options
    # on dev: --watch, // restart on file change


# monitoring
pm2 monit

# stop/delete
pm2 stop bot
pm2 delete bot

Alert

Alert could be sent using a telegram bot. It was created using BotFather.

It requires a TELEGRAM_BOT_TOKEN (via BotFather) and a TELEGRAM_BOT_CHAT_ID (from https://api.telegram.org/bo{token}/getUpdates['results'][0]['chat']['id']).