title: What should I do before pushing application to GitHub when using CodeIgniter
body: <p>this is my first time to publish my application using CodeIgniter. 
  I used to push applications using SpringBoot or Scala to GitHub. At that time there were only files which I developed, and library dependencies ware written in <code>build.gradle</code> and <code>build.sbt</code>. </p>
  
  <p>At this time, I am using CodeIgniter and there are a lot of files that have nothing to do with my application. Should I erase such files or publish my application without doing anything?? Or, is there something to do before pushing it to GitHub??</p>