Streamline, simplfy, and clean up the build process

[zbeucler-largo]

Remove unused parts of the build steps (EX: node-dirs-to-copy.txt) and figure out if we can simply it at all

[zbeucler-largo]

current simpleui-server build flags: tsc --allowJs --outDir dist/simpleui-server -t es5 --lib "es5,es2015,es2016" --moduleResolution node --sourcemap src/simpleui-server.ts src/simpleui-server.ts

Should be fine, but might want to research if using updatinges5 is beneficial. ES11 and ES12 are the current

• ECMAScript 2015 (also known as ES6) introduced classes, arrow functions, template literals, and the let and const keywords. It also added new array methods such as find, findIndex, and includes, as well as new methods for working with objects, such as Object.assign and Object.keys.
• ECMAScript 2016 (also known as ES7) introduced the Array.prototype.includes method and the exponentiation operator (**).
• ECMAScript 2017 (also known as ES8) introduced the async and await keywords for asynchronous programming, the Object.values and Object.entries methods, and the String.prototype.padStart and String.prototype.padEnd methods.
• ECMAScript 2018 (also known as ES9) introduced the Object.entries method, thePromise.prototype.finally method, and the RegExp.prototype.flags property.
• ECMAScript 2019 (also known as ES10) introduced the Array.prototype.flat and Array.prototype.flatMap methods, the Object.fromEntries method, and the String.prototype.trimStart and String.prototype.trimEnd methods.
• ECMAScript 2020 (also known as ES11) introduced the globalThis variable, the import.meta property, the Promise.allSettled method, and the String.prototype.replaceAll method. It also included improvements to the global JSON object, the Map and Set objects, and the WeakMap and WeakSet objects.