copilot fixed docker file

DockerFile → Dockerfile

@@ -10,10 +10,7 @@ ENV PATH="/home/user/.local/bin:$PATH"
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 
-# This creates the /app folder INSIDE the virtual container
-WORKDIR /app
-
-# Temporarily become root to install system dependencies for OpenCV
+# Install system dependencies required by OpenCV and PyTorch image handling
 USER root
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
@@ -23,15 +20,18 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 USER user
 
-# 🚨 TARGETED COPYING: We specifically grab files from your local 'backend' folder
-COPY --chown=user ./backend/requirements.txt requirements.txt
-RUN pip install --no-cache-dir --upgrade -r requirements.txt
+# Work from the repository root so the backend package imports resolve correctly
+WORKDIR /app
+
+# Install Python dependencies from the backend package
+COPY --chown=user ./backend/requirements.txt /app/backend/requirements.txt
+RUN pip install --no-cache-dir --upgrade -r /app/backend/requirements.txt
 
-# Copy everything else from the local 'backend' folder into the container's /app folder
-COPY --chown=user ./backend /app
+# Copy the backend package into the image
+COPY --chown=user ./backend /app/backend
 
 # Expose the specific port Hugging Face requires
 EXPOSE 7860
 
-# Launch the FastAPI server
-CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]
+# Launch the FastAPI server from the backend package
+CMD ["uvicorn", "backend.app:app", "--host", "0.0.0.0", "--port", "7860"]