Aggressive OpenCV fix - install all Mesa libraries and force headless only

Dockerfile

@@ -1,7 +1,7 @@
 # Base image - using bullseye for better compatibility
 FROM python:3.9-bullseye
 
-# Install system dependencies first
+# Install ALL system dependencies for OpenCV
 RUN apt-get update && apt-get install -y \
     libglib2.0-0 \
     libsm6 \
@@ -9,6 +9,9 @@ RUN apt-get update && apt-get install -y \
     libxrender1 \
     libgomp1 \
     libgl1-mesa-glx \
+    libgl1-mesa-dri \
+    libgl1-mesa-swx11 \
+    libglu1-mesa \
     libgtk-3-0 \
     libavcodec58 \
     libavformat58 \
@@ -21,6 +24,8 @@ RUN apt-get update && apt-get install -y \
     libtiff5 \
     libatlas-base-dev \
     gfortran \
+    mesa-utils \
+    xvfb \
     && rm -rf /var/lib/apt/lists/*
 
 # Set working directory
@@ -29,13 +34,13 @@ WORKDIR /app
 # Copy requirements and install Python packages
 COPY requirements.txt .
 
-# Install OpenCV headless first and remove any conflicting packages
-RUN pip install --no-cache-dir opencv-python-headless==4.8.1.78 && \
-    pip uninstall -y opencv-python opencv-contrib-python || true
+# Force remove any existing OpenCV packages and install only headless
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip uninstall -y opencv-python opencv-contrib-python opencv-python-headless || true && \
+    pip install --no-cache-dir opencv-python-headless==4.8.1.78
 
 # Install other dependencies
-RUN pip install --no-cache-dir --upgrade pip && \
-    pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy project files
 COPY . .