Fix environment and permission

[Minidoracat]

• I found that if user: "1000:1000" is not added, the command RUN mkdir -p /opt/palworld/Pal/Savedfails.
• RCONPort was not modified correctly.
• I also modified MAX_PLAYERS in the process.
• DefaultPalWorldSettings.ini does not get generated initially, so I included the default file in the project. Perhaps you have a better way.
• I changed / to ^ because my SERVER_NAME includes a URL, which contains /, leading to errors.

The above are my modifications. Thank you for your hard work and sharing.

[KagurazakaNyaa]

According to the description here, you should not add - prefix to port and players DefaultPalWorldSettings.ini should not be generated by this project, it is a file generated from steam update and installation, and is maintained by the game developer. The user: "1000:1000" parameter is provided by the upstream image cm2network/steamcmd:steam. In addition, the RUN statement in the Dockerfile will only be run when building the image, so it will not be affected by docker-compose.yml. The modification of RCONPort is indeed wrong, I will fix it. MAX_PLAYERS Modifying the configuration file is not necessary because the command line option will override it. Unless no command line option is specified, the configuration file value will be used, but this situation does not exist here. It’s the same reason that I didn’t add PUBLIC_IP and PUBLIC_PORT configuration file modifications.