truffle-config.js

require("babel-register");
require("babel-polyfill");
require("dotenv").config();

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1", // Localhost (default: none)
      port: 8545, // Standard Ethereum port (default: none)
      network_id: "*", // Any network (default: none)
    },
  },
  contracts_directory: "./src/contracts/",
  contracts_build_directory: "./src/abis/",
  compilers: {
    solc: {
      version: "0.6.0", // Fetch exact version from solc-bin (default: truffle's version)
      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
      settings: {
        // See the solidity docs for advice about optimization and evmVersion
        optimizer: {
          enabled: false,
          runs: 200,
        },
        //  evmVersion: "byzantium"
      },
    },
  },

  // Truffle DB is currently disabled by default; to enable it, change enabled: false to enabled: true
  //
  // Note: if you migrated your contracts prior to enabling this field in your Truffle project and want
  // those previously migrated contracts available in the .db directory, you will need to run the following:
  // $ truffle migrate --reset --compile-all

  db: {
    enabled: false,
  },
};