Update Dockerfile

Dockerfile

@@ -1,7 +1,7 @@
 # Use Python 3.7 (Slim Debian-based)
 FROM python:3.7-slim
 
-# Install system dependencies for Lucid and OpenCV
+# Install system dependencies
 RUN apt-get update && apt-get install -y \
     libgl1-mesa-glx \
     libglib2.0-0 \
@@ -17,12 +17,13 @@ ENV HOME=/home/user \
 
 WORKDIR $HOME/app
 
-# Upgrade pip and set up the legacy stack
-# Note: numpy 1.18.5 is required for TF 1.15.5 compatibility
+# Upgrade pip and install the legacy stack
+# CRITICAL: Added protobuf==3.19.6 to fix the Descriptor error
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir \
     numpy==1.18.5 \
     tensorflow==1.15.5 \
+    protobuf==3.19.6 \
     lucid>=0.2.3 \
     gradio==3.34.0 \
     Pillow