Question about docker image for UE4 DS server

[mornsyang]

1. Dockerfile about: FROM adamrehn/ue4-full:4.24.3 AS builder, mirror "adamrehn/ue4-full" is now unable to pull, please ask if there is another base image here that can be used instead?
2. Important, please ask a question: for the current project, after packing the DS server into a Linux project file, use dockerfile to pack it into an image. Then use the pod of kubernetes to start the image. After observing, the image cannot be started successfully in pod, corresponding to CMD or ENTRYPOINT, the image is executed with the packaged Linux project startup script, and the log shows that there is no successful binding of port, such as 7777. However, the DS server can be started successfully by directly executing the startup script in the packaged Linux project file.
Currently, the integrity of the COPY file has been verified, the user's permissions (into the pod, direct execution of the script, can successfully start the DS), so I do not know what the problem is?
Hope to get your answer, thank you very much!