Updated folder structrue and README

Dockerfile

@@ -5,7 +5,7 @@ FROM python:3.11-slim
 WORKDIR /app
 
 # Copy the Python script into the container
-COPY tcp_sia_server.py /app/
+COPY backend/tcp_sia_server.py /app/
 
 COPY requirements.txt .
 
@@ -15,4 +15,4 @@ RUN pip install --no-cache-dir -r requirements.txt
 EXPOSE 9000
 
 # Run the script
-CMD ["python", "tcp_sia_server.py"]
+CMD ["python", "backend/tcp_sia_server.py"]