Shikshalokam School Assessment APIs version: 0.0.1 Environment variables: Hostname HOST = localhost Port number POST = 3000 Mongo DB connecting string MONGODB_URL = mongodb://localhost:27017 Database name DB = dbname Log level 0 EMERGENCY system is unusable 1 ALERT action must be taken immediately 2 CRITICAL the system is in critical condition 3 ERROR error condition 4 WARNING warning condition 5 NOTICE a normal but significant condition 6 INFO a purely informational message 7 DEBUG messages to debug an application LOG = debug port Define environment NODE_ENV = development Environment: production NODE_ENV=production node app.js stage NODE_ENV=stage node app.js qa NODE_ENV=qa node app.js development NODE_ENV=development node app.js