feature request: Middleware to check valid ticker

[BeauBouchard]

Description

Create a middleware that checks the symbol to make sure its valid amx, nasdaq, nyse listing, as those are relatively the only ones that will show up for finviz charts. There should be about ~7500 of them, and the list changes often, which may require a service, or maintaining some changes down the road for things being delisted, although the image / chart generated will just be an invalid image, and not break the api or most clients.

Tasks

• create new file middleware/tickerChecker.js
• make a way to check the symbol/ticker against a list
• tests

[BeauBouchard]

There is a repo, https://github.com/rreichel3/US-Stock-Symbols, which seems to be highly maintained, last updated 14 hours ago.

Their list https://raw.githubusercontent.com/rreichel3/US-Stock-Symbols/main/all/all_tickers.txt seems like a great starting point.