Update Dockerfile

Dockerfile

@@ -1,21 +1,31 @@
 FROM python:3.12-slim
 
+# Install system dependencies required by OpenCV (cv2)
+# libgl1 is required for libGL.so.1
+# libsm6 and libxext6 are also commonly needed by imaging libraries in a headless environment.
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    libgl1 \
+    libsm6 \
+    libxext6 && \
+    rm -rf /var/lib/apt/lists/*
+
 # Set the working directory in the container
 WORKDIR /app
 
 # Copy the requirements file into the container
 COPY requirements.txt .
 
-# Install all Python dependencies
+# Install all Python dependencies, including opencv-python, which now finds its system libraries.
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Install gunicorn to run the Flask app
 RUN pip install gunicorn
 
 # Copy all application code into the current directory (/app)
-# This is the line that must be simple: COPY <source> <destination>
 COPY . .
 
 # Define the default command to run the application using gunicorn.
 # The 'app:app' assumes your Flask app instance is named 'app' inside 'app.py'.
-CMD exec gunicorn --bind :7860 --workers 1 --threads 8 app:app
+# The port is set to 7860 as required by Hugging Face Spaces.
+CMD exec gunicorn --bind :7860 --workers 1 --threads 8 app:app