Dockerhub image doesn't match Github name

[snowskeleton]

Here on github and in your readme instructions, you refer to this project as uptimekuma-agent. However, on docker hub, it's spelled 'uptimkuma-agent' (note the missing E after 'tim'). As currently written, the instructions in your readme don't work because of this typo.

To fix, either:
A) create an appropriately named repository on dockerhub
B) change the sample code in your readme to properly reference the dockerhub image.

[snowskeleton]

Also, in your sample docker-compose.ymal, you use an underscore (_) instead of a dash (-).