Improve proxy nginx performance, optimise logs

[dmytrotkk]

Problem

1. Due to the high load users sometimes experience timeout errors:

Error: missing response (requestBody="{\"method\":\"eth_getBlockByNumber\",\"params\":[\"latest\",false],\"id\":47,\"jsonrpc\":\"2.0\"}", requestMethod="POST", serverError={"errno":-60,"code":"ETIMEDOUT","syscall":"connect","address":"18.118.22.234","port":443}, ...

2. Logs in nginx don't include proxy redirect path
3. Logs file size limit is too low

Solution

A few changes need to be made to fix it:

1. Tune nginx config to use all 8 cores
2. Enable and configure ngx_http_stub_status_module in nginx to see live stats
3. Increase log file size 10 times 👀
4. Add proxy path to logs