First create a .env file on the root directory of the project the file should look like this
''' DATABASE = your-mongo-db-uri
GITHUB_CLIENT_ID = your-github-app-client-id
GITHUB_CLIENT_SECRET = your-github-app-client-secret
GITHUB_CALLBACK_URL = your-github-app-callback-url
SESSION_SECRET = your-app-session-secret-it-can-be-any-string-of-your-choice
'''
replace these keys with the appropriate data.
run
npm install
and then
run npm run dev