Feat / logger to save info, warning, error to local log files

[gyozajiro]

Add logger to save info, warning, error to local log files.

[gyozajiro]

Currently logs/app.log will capture all info, error logs. I'll find out how to filter out error log in the app.log.

Note that development branch has been updated to use the decimal param in the request. Please refer to the test/postman/Gateway-Ethereum-Base.postman_collection.json file for updated params.

[gyozajiro]

# capture any info type logging
logs/app.log

# capture any error type logging
logs/error.log

# capture any unhandled exceptions
logs/rejection.log

[fengtality]

Currently logs/app.log will capture all info, error logs. I'll find out how to filter out error log in the app.log.

I think it's good that app.log contains all log messages, including errors.

[RC-13]

Tested and confirmed by QA

Test summary:

• pull and run gateway branch
• create amm_arb strategy using HB (source)
• run strategy
• review logs folder inside gateway ->3 files found : Ok -> review app.log: informative output = 12/25/2020, 7:12:35 PM | info | Pools Retrieved. mainnet = 12/25/2020, 7:18:29 PM | error | missing response -> review error.log : compare error logs and error output saved on app.log - Ok -> review rejection.log : no error captured during test
  • delete log files and start gateway instance : files recreated - Ok