diff --git a/Dockerfile b/Dockerfile
index 2d5a802b1..96f942ec3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,14 @@
 # syntax=docker/dockerfile:1
 
-FROM python:3.8-slim-buster
+FROM python:3.9-slim-buster
 
 WORKDIR /pymodbus
 
+EXPOSE 8080
+EXPOSE 5020
+
 COPY . .
 
 RUN pip3 install -r requirements.txt && pip3 install -e .
 
+CMD [ "pymodbus.server", "--host", "127.0.0.1", "--web-port", "8080", "--no-repl", "run", "--modbus-port", "5020", "--modbus-server", "tcp" ]
diff --git a/README.rst b/README.rst
index b6023b38f..a9cc8ed4c 100644
--- a/README.rst
+++ b/README.rst
@@ -193,6 +193,14 @@ Or to install a specific release:
 You can also use Docker to run a local image with the package installed on the image:
 
     docker pull riptideio/pymodbus
+   
+To run this, you will need to expose ports 8080 and 5020, you can the container running:
+
+    docker run -it -p 8080:8080 -p 5020:502 riptideio/pymodbus
+
+You can also override the default command running the server with any of the examples:
+
+    docker run -it -p 8080:8080 -p 5020:502 riptideio/pymodbus examples/server_sync.py
 
 Otherwise you can pull the trunk source and install from there::