Dockerfile for Half-Life 1 dedicated server
Create the image with
docker build -t hldsimage .
If it doesn't work on the first time, try running the image build again. Sometimes the app_update from Steam just fails.
Run a new container with
docker run --name hlds -p 27015:27015 -p 27015:27015/udp -p 26900:26900/udp -p 27020:27020/udp hldsimage