Update and rename codeql.yml to main.yml

[Knifex3]

name: Node.js CI

on:
push:
branches:
- main
pull_request:
branches:
- main

jobs:
build:

runs-on: ubuntu-latest

strategy:
  matrix:
    node-version: [20.x]

steps:
- name: Checkout repository
  uses: actions/checkout@v3

- name: Set up Node.js
  uses: actions/setup-node@v3
  with:
    node-version: ${{ matrix.node-version }}

- name: Install dependencies
  run: npm install

- name: Start application
  run: npm start