docs: comments in the api/conf/config.yaml need to be aligned

[membphis]

The current comment style is not good to read.

They should be aligned for easy reading.

we should use a better style, here is an example:

conf:
  listen:
    host: 127.0.0.1     # `manager api` listening ip or host name
    port: 9000          # `manager api` listening port
  etcd:
    endpoints:          # supports defining multiple etcd host addresses for an etcd cluster
      - 127.0.0.1:2379
  log:
    error_log:
      level: warn       # supports levels, lower to higher: debug, info, warn, error, panic, fatal
      file_path:
        logs/error.log  # supports relative path, absolute path, standard output
                        # such as: logs/error.log, /tmp/logs/error.log, /dev/stdout, /dev/stderr
authentication:
  secret:
    secret              # secret for jwt token generation.
                        # NOTE: Highly recommended to modify this value to protect `manager api`.
                        # if it's default value, when `manager api` start , it will generate a random string to replace it.
  expire_time: 3600     # jwt token expire time, in second
  users:
    - username: admin   # username and password for login `manager api`
      password: admin
    - username: user
      password: user

[96RadhikaJadhav]

@membphis Could you please assign the issue to me? I wish to work on it.

[nic-chen]

@membphis Could you please assign the issue to me? I wish to work on it.

that's great. thanks.

[96RadhikaJadhav]

@membphis Could you please review my PR?

[membphis]

@membphis Could you please review my PR?

I have reviewed ^_^