When working on the landing page, I had problems with storing pictures. I use Google Photos and a program to reduce links, but in this situation, pictures are not always uploaded to Codepen. Also I can not store svg pictures.
Can I use github for this? Is it possible to show a page using GitHub for example on a forum?
Let me flip your question on its head. Can you come up with a single likely reason NOT to use gitHub? Many employers now list that as a skill for a potential employee.
Thank you for asking @snowmonkey 
As I understood all the functions I asked about is in GitHub. Accordingly, the answer to your question is no.
Exactly. Yes, you can post code to github, you can post gists, you can even host from github. I host elsewhere, but I use git as my mechanism to push updates to github as well.
Personally, I can think of no reason why we shouldn’t be getting comfortable with github. Most companies are looking for some sort of version control, and git is a big part of that world.