config.js

const path = require("path");
const fs = require("fs");

const config = {
    mysql: {
        host: process.env.DB_HOST,
        database: process.env.DB_NAME,
        user: process.env.DB_USER,
        password: process.env.DB_PASS,
    },
    telegram: {
        username: process.env.BOT_NAME,
        token: process.env.BOT_TOKEN,
    },
    limiter: {
        enabled: process.env.LIMITER_ENABLED,
        window: process.env.LIMITER_WINDOW,
        limit: process.env.LIMITER_LIMIT,
    },
    http: {
        agent: process.env.HTTP_AGENT,
    },
    whitelist: process.env.WHITELIST ? process.env.WHITELIST.split(",") : [],
};

const envConfFile = path.resolve(
    __dirname,
    `config.${process.env.NODE_ENV}.js`
);

if (process.env.NODE_ENV && fs.existsSync(envConfFile)) {
    Object.assign(config, require(envConfFile));
}

module.exports = config;