When CoinGecko API goes offline, all oracle infrastructure will go offline

[OhhBilboBaggins]

Porting this bug over from classic-terra#36 courtesy of @nghuyenthevinh2000

It is not the API that is highly unstable, it is the price server which is unreliable. Starting from the fact that if the Coingecko API goes offline, all oracle infrastructure will go offline, and ending with no valuable information in logs.

[INFO][Mon, 18 Dec 2023 05:36:09 GMT] [VOTE] Requesting prices from price server http://oracle-price-server:8532/latest
[ERROR][Mon, 18 Dec 2023 05:36:09 GMT] Error: cannot find LUNC price
    at preparePrices (/app/src/vote.ts:114:11)
    at processVote (/app/src/vote.ts:195:18)
    at async vote (/app/src/vote.ts:333:5)
    at async main (/app/src/index.ts:126:5)