To connect to MongoDB server
DB_URL
: MongoDB server url. E.g.mongodb://127.0.0.1:27017
DB_NAME
: Name of database to use in MongoDB
To send emails
ADMIN_EMAIL
: Provide email of admin to send server emails like backup etc..EMAIL_HOST
: Host of email providerEMAIL_PORT
: Port of email providerEMAIL_USER
: Username of email providerEMAIL_PWD
: Email passwordEMAIL_SERVICE
: Email service (must be a well known Nodemailer service)