The current implementation does not handle NO_PROXY env var.

I removed explicit proxy handling, since axios already
handle proxy related environment variables.

See https://github.com/axios/axios#request-config:

`proxy` defines the hostname, port, and protocol of the proxy server.
You can also define your proxy using the conventional `http_proxy` and
`https_proxy` environment variables. If you are using environment
variables
for your proxy configuration, you can also define a `no_proxy`
environment
variable as a comma-separated list of domains that should not be
proxied.

This helps to avoid the error `unable to get local issuer certificate`
when using a corporate maven repository.

Another solution would be to declare the env var
NODE_TLS_REJECT_UNAUTHORIZED=0.

- Implemented replaceEnvPlaceholders function to replace ${VAR}
  placeholders in config values with corresponding environment variable
  values.
- If the environment variable does not exist, the placeholder remains
  unchanged.

- Implemented functionality to query Maven repository using authToken
  and strict-ssl settings from npmrc.
- Updated httpModuleConfigFactory to configure HTTPS agent based on
  npmrc settings.
- Enhanced NpmrcService to retrieve authToken and strict-ssl
  settings.