Setting the environment for:

Running in DEVELOPMENT mode

target file: config/development.json.sample

• change the filename to development.json and hardcode the environment variables values to be used in development

{
"jwtPrivateKey": <jwt key>,
"mongoURI": <mongodb connection string>,
"pgURL": <postgres connection string>,
"PORT": <port to the server on>
}

• set NODE_ENV=development in default.js or in the environment to use these configurations

warning : hardcoded configurations will be overridden if the environment variables are set

Running in PRODUCTION mode

target file: config/production.json.sample

• change the filename to production.json and hardcode the environment variables values to be used in production

{
"jwtPrivateKey": <jwt key>,
"mongoURI": <mongodb connection string>,
"pgURL": <postgres connection string>,
"PORT": <port to the server on>
}

• set NODE_ENV=production in default.js or in the environment to use these configurations

warning : hardcoded configurations will be overridden if the environment variables are set

Additional Info

default.json

config/default.json contains the common variables for all the environments, variables are hardcoded

warning : hardcoded configurations will be overridden if the environment variables are set

custom-environment-variables.json

config/custom-environment-variables.json

gets the configuration data from the environment variables

{
<key1>:<value>,
<key2>:<value>,
}

key = key to be used in the app

value = actual name of the env variable

const config = require("config");
var <variable_name> = config.get('key1');