Custom Built Glossary and Training Manual, with search feature

Hello,

I'm trying to locate an App in Teams that serves as a training and resource tool. Essentially I want the user to be able to search for a keyword that we use within our business, and then the App return with a selection of articles or links to files within Teams that have information relating to that topic, all of which will be writted from the ground up.

For example: If I wanted to search for the word 'Job Sheet', the app would return information that has this particular reference either in the body of the document, or as a tag/meta tag/keyword that I assign when writing the documents up. 

The idea is to input all the relevant data that relates to our line of work and then have the users use this tool for research.

If the App has a way to embed images within itself (screenshots that show any provesses) or video files, or link to PDF files that are stored on our local network all the better.

Thanks

Dan