Synch with Googleform/github



I’m hoping you guys might be able to help me with a problem I’m facing.
I need to capture plain text responses from participants taking part in a global competition. I need to find a way to:

  1. Ask the respondents to submit their plain text code via an online form (without it altering the code in any way)
  2. In an ideal world, this will synch with github and, in an even better world, also synch with Salesforce too.

To complicate matters, we work with schools, so we cannot ask them to create accounts on codeshare or github as they’ll be blocked, so it has to be a solution using an online form like googleform/form assembly.
I was told StackEdit might be a potential solution, but I don’t understand how it can work with forms etc.

Any guidance or ideas greatly appreciated!!