Implement simple full text search using MongoDB

[nuest]

Later we might leverage an advanced search engine (i.e. Elasticsearch), but for first prototypes MongoDB's full text search should suffice.

Resources:

• https://docs.mongodb.com/manual/core/index-text/
• http://code.tutsplus.com/tutorials/full-text-search-in-mongodb--cms-24835
• https://www.compose.com/articles/full-text-search-with-mongodb-and-node-js/

Calling http://.../api/v1/search?q=word should return a list of compendia matching "word"

Filters:

• ...?q=term&type={compendium,job} (would be interesting to index job log outputs!)

[nuest]

Don't user MongoDB because it does not allow auto-suggest search. Start with something serious from the beginning...