Dockerized PSFree setup + README update

Dockerfile

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+# Use official Python 3.10 slim image
+FROM python:3.10-slim
+
+# Set working directory
+WORKDIR /PSFree
+
+# Copy all files/folders from current directory into /PSFree
+COPY . /PSFree
+
+# Install required packages
+RUN pip install --no-cache-dir rich
+
+# Expose your app port (adjust if your app uses a different port)
+EXPOSE 52721
+
+# Run the python server
+CMD ["python", "serve.py"]