fix: use newer forum base image
The base docker image of tutor-forum plugin uses a deprecated Debian image. This fix updates the Debian image to a newer one.
Credit: This was a fix by @kaustav_banerjee originally.
The base docker image of tutor-forum plugin uses a deprecated Debian image. This fix updates the Debian image to a newer one.
Credit: This was a fix by @kaustav_banerjee originally.