export function buildConfigString(pairs: [string, string][]): string {

  let result = "";

  for (const [clave, valor] of pairs) {
    result += `${clave}=${valor}\n`;
  }

  return result.trim();
}

console.log(buildConfigString([["host","localhost"],["port","3000"]]));
console.log(buildConfigString([["a","1"]]));
// a=1

console.log(buildConfigString([]));
// ""