I also would Second the Idea of using Sphinx - it can be connected to a currently live database and given clues and sample queries to Index all text in the DB - https://
www.percona.com/resources/technical-presentations/how-optimally-configure-sphinx-search-mysql-percona-live-mysql and they have a video. I don't think there are any existent Docker setups to play with, although I imagine 8ch is quite custom anyway.