I like to do things just off the top of the hour, since top of the hour is when many maintenance crons run. If you’re running a modern cron daemon, you can rewrite that as:

3 1-23/6 * * * docker container restart lemmy-lemmy-1

https://crontab.guru/#3_1/6_*_*_*

I subscribe to !newcommunities@lemmy.world which helps. Other than that I look for mentions of other communities in comments, similar to how I used to on reddit.

I just gave this a play-through because of your recommendation. What an adorable game! Thank you for sharing it.