Add API for user FAQ

Hey guys, I looked at task "We need a function that returns results for questions from the database." in User Facing and there is a PR.

I also looked around and there are completed these tasks from User Facing:
* We need a function that returns results for questions from the database.
* This function should also be able to accept an industry and a job and will only show those results when submitted from the user.
* We need a function that returns results for answers to the a question based on the user selection.

I have completed all what could, the other tasks need some discussion or some tools I have suggested in Issues.

Please do code review if you do and let me know. I am used to do code review in all PRs before any merging. If you don't do that let me know and also why. Thanks