Update documentation to reflect that UID/GID are assigned to 1100

[Ralnoc]

That being said, I will be updating the documentation to surface this setting, along with the information on how it can be overridden if needed.
-- Source: #69

Update the project's README.md to clearly indicate that, by default, the main process within the container image runs with a UID and GID of 1100:1100. The following points should be addressed as part of this documentation update:

• Explicitly state in the README.md that the default user and group for the container is 1100:1100.
• Explain the rationale for selecting a UID/GID above the standard OS-level first users, and mention the security motivation where appropriate.
• Provide instructions or examples on how users can override the default UID/GID if they have requirements for different user or group IDs (e.g., via environment variables or build arguments).
• Reference the relevant line in entrypoint.sh that manages user/group assignment, and note that users should verify this logic works in their environment.

This update will ensure users are better informed about user permissions and reduce confusion or troubleshooting when running the image on systems where the default may not work as expected.