Update Dockerfile

Dockerfile

@@ -1,22 +1,29 @@
-# Use Python 3.9
-FROM python:3.9
+# Use a lightweight Python base to save download time
+FROM python:3.9-slim
 
-# Set working directory to /code
+# Install system compilers (needed for fast AI math)
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    cmake \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
 WORKDIR /code
 
-# Copy the requirements file first to leverage Docker cache
+# --- SMART CACHING LAYER ---
+# We copy ONLY requirements first. 
+# Docker will cache this step. If you change app.py later, 
+# it will SKIP installing these again!
 COPY ./requirements.txt /code/requirements.txt
-
-# Install dependencies
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-# Copy the rest of the application code
+# --- CODE LAYER ---
+# Now copy the rest of the code
 COPY . .
 
-# CRITICAL FOR HUGGING FACE: Create a cache directory and give permission
-# This prevents "Permission Denied" errors when downloading helper files
+# Create cache directory for Hugging Face permissions
 RUN mkdir -p /code/.cache && chmod -R 777 /code/.cache
 ENV TRANSFORMERS_CACHE=/code/.cache
 
-# Start the app on port 7860
+# Start the app
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]