Ensure Dockerfile uses python:3.12-slim and apt-get

Dockerfile

@@ -1,8 +1,7 @@
-# Use an official Python Alpine runtime as a parent image for smaller size
-FROM python:3.13-alpine
+# Use an official Python slim-buster runtime as a parent image
+FROM python:3.12-slim
 
 # Set the working directory in the container
-# All subsequent commands (COPY, RUN, CMD) use this path
 WORKDIR /app
 
 # Install system dependencies including Rust, build tools, pkg-config, cmake, and sentencepiece dev libs using apt-get
@@ -16,9 +15,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     # Clean up apt lists to reduce image size
     && rm -rf /var/lib/apt/lists/*
 
-# Set PKG_CONFIG_PATH to help find sentencepiece.pc
-ENV PKG_CONFIG_PATH=/usr/lib/pkgconfig:/usr/share/pkgconfig
-
 # Copy only the requirements file first to leverage Docker cache
 COPY backend/requirements.txt /app/requirements.txt
 
@@ -27,26 +23,15 @@ RUN pip install --no-cache-dir --upgrade pip
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy the rest of the application code into the container
-# This includes the backend directory, templates, static files etc.
-# Adjust the source paths based on your project structure relative to the Dockerfile location
 COPY backend/ /app/backend
 COPY templates/ /app/templates
 COPY static/ /app/static
-# We don't copy uploads dir, it will be created by the app if needed
 
 # Create the necessary directories within the container that the app expects
-# Although the app tries to create them, it's good practice for Dockerfile to ensure they exist
 RUN mkdir -p /app/templates /app/static /app/uploads
 
-# Make port 8000 available to the world outside this container
-# Hugging Face Spaces often map to this port from the outside world (port 7860 is also common)
+# Make port 8000 available
 EXPOSE 8000
 
-# Define environment variable (optional)
-# ENV NAME World
-
-# Run main.py using uvicorn when the container launches
-# The command needs to specify the location of the app module (backend.main:app)
-# Host 0.0.0.0 makes it accessible from outside the container
-# Add --reload flag for development if needed, but remove for production
+# Run main.py using uvicorn
 CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8000"]