Fix Dockerfile: update OpenGL package name for Debian trixie compatibility

Dockerfile

@@ -7,12 +7,13 @@ RUN apt-get update && apt-get install -y \
     wget \
     curl \
     build-essential \
-    libgl1-mesa-glx \
+    libgl1-mesa-dev \
     libglib2.0-0 \
     libsm6 \
     libxext6 \
     libxrender-dev \
     libgomp1 \
+    libgthread-2.0-0 \
     && rm -rf /var/lib/apt/lists/*
 
 # Create a non-root user (required by Hugging Face Spaces)