Add docker

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 /app
+
+# Copy the current directory contents into the container at /app
+COPY . /app
+
+# Install any needed packages specified in requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Make port 5001 available to the world outside this container
+EXPOSE 5001
+
+# Define environment variable
+ENV FLASK_APP=main.py
+
+# Run app.py when the container launches
+CMD ["python", "main.py"]