minor fixes

Dockerfile

@@ -1,6 +1,8 @@
 
 # Use NVIDIA CUDA base image (Ubuntu 22.04 jammy)
-FROM nvidia/cuda:12.3.2-devel-ubuntu22.04
+# FROM nvidia/cuda:12.3.2-devel-ubuntu22.04
+FROM nvidia/cuda:12.3.2-devel-ubuntu20.04
+
 
 # Non-interactive apt
 ENV DEBIAN_FRONTEND=noninteractive
@@ -16,7 +18,6 @@ ENV PYVISTA_OFF_SCREEN=true
 ENV VTK_DEFAULT_RENDER_WINDOW_OFFSCREEN=1
 ENV DISPLAY=:99
 ENV LIBGL_ALWAYS_SOFTWARE=1
-ENV MESA_LOADER_DRIVER_OVERRIDE=llvmpipe
 ENV MESA_GL_VERSION_OVERRIDE=3.3
 
 # System deps + Deadsnakes PPA for Python 3.12
@@ -85,5 +86,6 @@ ENV HOST=0.0.0.0
 ENV PORT=7860
 
 # Run app
-CMD ["python", "app.py"]
+# CMD ["python", "app.py"]
+CMD python app.py 2>&1 | tee /tmp/app.log
 

app.py

@@ -122,6 +122,10 @@ def main():
             
             print(f"🚀 Starting Trame server on {host}:{port}")
             
+            if demo.server.state.health == "running":
+                print("Trame server already running, not starting again.")
+                return
+
             # Configure server to bind to the specified host
             try:
                 # Try with host parameter first (if supported)