Enhancement/request logs

[lok52]

Changes:

• Request data is logged to console, as well as to a file. You can specify ignored routes (for console logging), space separated, via RELAYER_LOG_IGNORE_ROUTES env, e.g. /fee /params/hash/tx. Also, I removed some common headers from requests to not flood the logs. Example request log:

info: HTTP GET /params/hash/tree {"meta":{"req":{"headers":{"host":"127.0.0.1:8000","user-agent":"PostmanRuntime/7.30.0"},"httpVersion":"1.1","method":"GET","originalUrl":"/params/hash/tree","query":{},"url":"/params/hash/tree"},"res":{"statusCode":200},"responseTime":1}}

Closes #67

This PR should be considered as a draft, so any suggestions about logs format are welcome.

[akolotov]

Consider to reduce the level for the http data to debug as so it is possible to filter it by setting RELAYER_LOG_LEVEL to info.

[lok52]

Updates:

• Set level to debug
• Removed duplicated properties from request log, such as url, originalUrl, query, method

Now, log looks like this:

debug: HTTP GET /siblings?index=10 {"meta":{"req":{"headers":{"host":"127.0.0.1:8000","user-agent":"PostmanRuntime/7.30.0"},"httpVersion":"1.1"},"res":{"statusCode":400},"responseTime":4},"timestamp":"2023-01-09T14:15:11.570Z"}