ci: remove invalid test, fix Dockerfile CMD entrypoint args again

Author: Xevion

.github/workflows/image.yaml

@@ -19,9 +19,6 @@ jobs:
 
       - name: Test image functionality
         run: |
-          # Test that the image can start and show help
-          docker run --rm livecards-test --help
-
           # Test server startup
           docker run -d --name test-server -p 8000:8000 livecards-test
 

Dockerfile

@@ -72,4 +72,4 @@ HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
 
 # Use ENTRYPOINT for the executable and CMD for default arguments
 ENTRYPOINT ["/usr/src/app/livecards"]
-CMD 0.0.0.0:${PORT}
+CMD ["0.0.0.0:8000"]