@Chad nope. Redis and MongoDB are not comparable with MySQL first ahead as both are NoSQL. Additionally they also use a different port than MySQL. So basically you can install and run them without any issues.
Index Title Question
How to change the title of index page?
I've already change in ACP but still show "nodebb" everytime i share in facebook.
Ah, what page is this? I just hopped on a random NodeBB forum and didn't repro this issue
my homepage. eg. http://example.com/
when i share it to facebook it still show the "nodebb" on index title.
Try your url at https://developers.facebook.com/tools/debug/ with no caching, facebook usually caches the og data.