It is ASSUMED that frontend, backend and webhook are in the same directory:

.
├── council.csie-backend
├── council.csie-frontend
└── council.csie-webhook

Copy dotenv to .env

Modify the variables:

• SECRET: secret defined in the webhook setting
• PORT: port used to host the webhook server
• BRANCH: branch that triggers updating when someone pushed on
• BACKEND: name of backend service in pm2
• FRONTEND: name of frontend service in pm2

Assume ${GIT ROOT REPO} be the root directory of this git repository (that is, a directory containing .git). Generate a ssh key called repo_key in ${GIT ROOT REPO}/webhook.

$ ssh-keygen
chmod 400 repo_key

Then, put repo_key.pub to the "deploy keys" on Github.