Docker container won't start with existing files in /var/www/html

[derekpovah]

Description

The container fails to start if there are existing files in /var/www/html

Steps to reproduce

• Start the container with a Docker volume that drops a file in /var/www/html
  • docker run -d -v /path/to/file:/var/www/html/some-file.txt adolfintel/speedtest

Expected behaviour

The container should start

Additional Details

As of this writing, /var/www/html in the parent image (php:7.2-apache) is empty, so what's the benefit of doing this?: https://github.com/librespeed/speedtest/blob/eca7f06e217b739e2c6cb14f3f4b4da9ea9be921/docker/entrypoint.sh#L6-L7

[sstidl]

Please elaborate on the use-case you are trying to achive.