** Using WeBWorK **

About a year ago the connectivity test was added to conf/webwork.apache2.4-config a modified version of which becomes /etc/apache2/conf-enabled/webwork.conf in the Docker container. 

The only way I know to disable the connectivity test for a Docker setup is to comment out the relevant line in /etc/apache2/conf-enabled/webwork.conf . That needs to done in a manner which will override the fixed version of the file already inside the Docker image (which has the "ping" line).

The best suggestion I have is to make a copy of the file from the Docker image, comment out the "ping" line, and then mount the modified file via docker-compose.yml so that when you run "docker-compose up" the modified version will be used.

Rough process:

• cd your_webwork2_directory
• mkdir LOCAL
• docker-compose up -d
• docker cp webwork2_app_1:/etc/apache2/conf-enabled/webwork.conf ./LOCAL/webwork.conf
  
• docker-compose down
  
• vi LOCAL/webwork.conf # or use some other editor
• # comment out the "ping" line.
• vi docker-compose.yml   # or use some other editor
• # Add a line in the volume section for the webwork container with something like
• #      - "./LOCAL/webwork.conf:/etc/apache2/conf-enabled/webwork.conf"
• # to mount the modified file to override the existing one.

Note: I saw an explanation on how to create a "dummy container" to access a file via "docker cp" without needing to run the container. See the section on "docker create" at https://stackoverflow.com/questions/22049212/copying-files-from-docker-container-to-host

Commit where the ping was added:   https://github.com/openwebwork/webwork2/commit/4d61cc8df1910220f8e0bc96ecaf95b67e95383f#diff-0b9a7a8accb83f5161b50707d0be242f