diff --git a/.gitignore b/.gitignore
index c84d1ef..9595164 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ venv/**
 **/**.log
 **/**.pid
 **.so
+**.DS_Store
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 6a82cd8..68e3197 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use an official Python runtime as a parent image
-FROM python:3.8-slim
+FROM python:3.9-slim
 
 # Set the working directory to /app
 WORKDIR /app
@@ -7,18 +7,19 @@ WORKDIR /app
 # Copy the current directory contents into the container at /app
 COPY . /app
 
+# Install essential tools and Python
 RUN apt-get update && \
     apt-get install -y build-essential cmake gcc g++
 
-
 # Install any needed packages specified in requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip3 install --no-cache-dir --upgrade pip && \
+    pip3 install --no-cache-dir -r requirements.txt
 
 # Make port 80 available to the world outside this container
 EXPOSE 8081
 
 # Define environment variable
-ENV NAME World
+# ENV NAME World
 
 # Run app.py when the container launches
-CMD ["python", "./server/websocket_server.py"]
\ No newline at end of file
+CMD ["python3", "./server/websocket_server.py"]
diff --git a/README.md b/README.md
index eeb2ad1..0700366 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,10 @@ $ supervisord -c supervisord.conf
 
 ## docker
 ```
-$docker build -t gpt_python_server .
-$docker run -p 8081:8081 gpt_python_server
+$docker build -t gpt_python_server:1.0 .
+$docker run -p 8081:8081 gpt_python_server:1.0
+
+// in case need to debug docker container
 $docker docker exec -it <container-id> /bin/bash
 ```