Create Dockerfile

Dockerfile

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+# Use an official Python runtime as a parent image
+FROM python:3.9-slim
+
+# Set the working directory in the container
+WORKDIR /code
+
+# Copy the requirements file into the container
+COPY requirements.txt .
+
+# Install any needed packages specified in requirements.txt
+# Using --no-cache-dir reduces image size
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy the Flask application code into the container
+COPY app.py .
+
+# Make port 7860 available to the world outside this container
+# This is the port Hugging Face Spaces expects by default for web apps
+EXPOSE 7860
+
+# Define environment variable for Flask (optional but good practice)
+# ENV FLASK_APP=app.py # Not strictly needed when using `flask run` like below
+
+# Command to run the application when the container launches
+# Use 'flask run' for development/simple cases. For production, gunicorn is often preferred.
+CMD ["flask", "run", "--host=0.0.0.0", "--port=7860"]