S.O.L.I.D stands for:
S - Single-responsiblity principle
O - Open-closed principle
L - Liskov substitution principle
I - Interface segregation principle
D - Dependency Inversion Principle

var HelloWorld = artifacts.require('HelloWorld');

module.exports = function(deployer) {
  // Use deployer to state migration tasks.
  deployer.deploy(HelloWorld);
};