Robustness fixes

Dockerfile

@@ -6,7 +6,6 @@ ENV PYTHONUNBUFFERED=1
 # Install system dependencies
 RUN apt-get update && apt-get install -y \
     fonts-dejavu \
-    usbutils \
     && rm -rf /var/lib/apt/lists/*
 
 # Set working directory
@@ -16,9 +15,6 @@ WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy the application
-COPY client.py .
-COPY templates.py .
-
+# Application files will be mounted via volume
 # Run the application
 CMD ["python", "client.py"]