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+# Start with an official Python base image.
+# Using a "slim" version is a good practice for smaller container sizes.
+FROM python:3.11-slim
+
+# Set the working directory inside the container.
+WORKDIR /app
+
+# Copy the requirements file into the container.
+COPY requirements.txt .
+
+# Install the Python dependencies.
+# The `--no-cache-dir` flag is a best practice for smaller Docker images.
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of your application code into the container.
+COPY . .
+
+# Expose the port that the application will run on.
+# Hugging Face Spaces automatically provides a PORT variable, typically 7860.
+# FastAPI will run on this port inside the container.
+EXPOSE 7860
+
+# The command to run your application when the container starts.
+# We use Gunicorn as a robust production server.
+CMD ["gunicorn", "-w", "1", "--preload", "-k", "uvicorn.workers.UvicornWorker", "-b", "0.0.0.0:7860", "main:app"]