Is it possible to generate an automatic Table of Contents using Github Flavoured Markdown?
Majority of other answers require to install some tool. I found a quick and easy online solution https://imthenachoman.github.io/nGitHubTOC.
For any markdown input it generates table of content output. You can specify minimum and maximum heading level.
The source code is located at https://github.com/imthenachoman/nGitHubTOC