Improve how to use a symlink for a QGIS plugin

[Gustry]

It would be nice to have :

• a better warning when the plugin is using a symlink
• indicate the workflow to use a QGIS plugin with the code located on the host (when we want to do some dev on a QGIS server plugin)

[dmarteau]

indicate the workflow to use a QGIS plugin with the code located on the host (when we want to do some dev on a QGIS server plugin)

Yup, this a very common mistake with people using symlink with Docker container: they forget that the link target must also exists inside the container.

[dmarteau]

indicate the workflow to use a QGIS plugin with the code located on the host (when we want to do some dev on a QGIS

Difficult to give a fit-them-all response since it depends heavily on how you are using the container. A the most basic level this resume to 'mount the target path on the container' which is the only advice that the warning can spit out.