fix: move libgl1-mesa-glx installation to a separate RUN command

Dockerfile

@@ -2,6 +2,7 @@ FROM python:3.11-slim
 
 WORKDIR /app
 
+# Install base system dependencies
 RUN apt-get update && apt-get install -y \
     build-essential \
     curl \
@@ -9,13 +10,21 @@ RUN apt-get update && apt-get install -y \
     git \
     && rm -rf /var/lib/apt/lists/*
 
+# === THIS IS THE NEW LINE TO FIX THE ERROR ===
+# Force install the missing library required by OpenCV
+RUN apt-get install -y libgl1-mesa-glx
+# ============================================
+
+# Copy and install Python requirements
 COPY requirements.txt ./
 COPY src/ ./src/
-
 RUN pip3 install -r requirements.txt
 
+# Expose the port Streamlit will run on
 EXPOSE 8501
 
+# Healthcheck to ensure the app is responsive
 HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
 
+# Command to run the Streamlit application
 ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]