v3.0.2-ailab.2

FEAT: Add ALLOWED_DEST environment variable for SSH tunnel destination restrictions

Updated README.md to document the new ALLOWED_DEST variable, allowing users to control SSH tunnel destinations.
Implemented validation for ALLOWED_DEST in entrypoint.sh to ensure correct format and enforce restrictions.
Added Dockerfile.test for testing various ALLOWED_DEST configurations.
Created docker-compose.test.yml to facilitate testing of different SSH server setups with varying tunnel restrictions.
Introduced comprehensive testing scripts and README in the test directory to guide users through testing the new functionality.

v3.0.2-ailab.1

updated workflows

v3.0.2

Do not change ownership of host keys directory (#10)

This line was preventing me from mounting my own persistent host keys.
I also don't think it should be owned by the unprivileged tunnel user.