Configurable log options

[miloslavkostir]

In my Laravel projects I'm used to create log options configurable. Projects run in Docker container and the log dir is mapped out of the container.

[ssddanbrown]

Thanks for offering this PR @miloslavkostir, but I'm not keen on adding extra env options without proven wider need.

Not sure why you can't map the existing directory/file out of a container already.
Otherwise, some other options are:

• Patch the option as part of your container build process.
• Use the logical theme system to override the option.