Update Dozzle documentation with log access details and guide link

[RaneyDazed]

Enhanced the Dozzle documentation to clarify that it can only monitor logs output to sysout or syserr, aligning expectations with its operational scope similar to docker logs. Updated the documentation links to point to the more informative guide section rather than the repository. Also provided an example setup for monitoring non-sysout/syserr logs by tailing an external log file within an Alpine container configuration. This addition offers a workaround for users needing to track logs not natively accessible by Dozzle.

[RaneyDazed]

Well shoot idk if I did that right