doc: python user guide (#111)

Author: tungbq

README.md

@@ -71,7 +71,9 @@ chmod +x check_version_in_toolkit.sh
 ```
 
 ## Use the official image from Docker Hub
+
 DockerHub image [tungbq/devops-toolkit](https://hub.docker.com/r/tungbq/devops-toolkit)
+
 ```bash
 docker pull tungbq/devops-toolkit:latest
 ```
@@ -101,15 +103,23 @@ docker run --rm devops-toolkit:latest ansible --version
 ## Running Sample Tool Code Inside the Toolkit
 
 Check out the full samples and instruction at [samples](./samples/)
+
 - Run with default docker network
+
 ```bash
 docker run --rm devops-toolkit:latest samples/run_sample.sh
 ```
+
 - Run with host network
+
 ```bash
 docker run --network host --rm devops-toolkit:latest samples/run_sample.sh
 ```
 
+## User guide
+
+- [DevOps toolkit user guide](./docs/usage/)
+
 ## The DevOps Toolkit Core
 
 Built on `ubuntu:22.04` base image

docs/TROUBLESHOOTING.md

@@ -0,0 +1,10 @@
+# Most common error
+
+- <https://stackoverflow.com/questions/62154016/docker-on-wsl2-very-slow>
+
+- exec /usr/local/bin/kubectl: exec format error
+See: <https://stackoverflow.com/questions/73398714/docker-fails-when-building-on-m1-macs-exec-usr-local-bin-docker-entrypoint-sh>
+
+- Check architecure: dpkg --print-architecture
+
+- docker: Error response from daemon: Conflict. The container name "/my_devops_toolkit" is already in use by container

docs/troubleshooting/TROUBLESHOOTING.md

@@ -0,0 +1,11 @@
+# The devops-toolkit usage
+
+This guide us how to use the `devops-toolkit` with serveral usecases
+
+## Python
+
+- Check [python_usage](./python_usage.md)
+
+## Troubleshooting
+
+- For any issues, check [this document](../troubleshooting/TROUBLESHOOTING.md)

docs/usage/README.md

@@ -0,0 +1,41 @@
+# Use python in the devops-toolkit
+
+To use the existing container isntead of creating one, use `docker exec` command instead of `docker run`
+
+```bash
+docker exec -it my_devops_toolkit /bin/bash
+```
+
+## Run python sample code provided in the container
+
+```bash
+docker run --name my_devops_toolkit --network host -it devops-toolkit:latest
+# You now in the container terminal
+python3 samples/python/rectangle_area_calculator.py
+```
+
+## Clone external code to container
+
+```bash
+docker run --name my_devops_toolkit --network host -it devops-toolkit:latest
+# You now in the container terminal
+
+# Clone code
+mkdir python_workspace
+cd python_workspace
+git clone https://github.com/geekcomputers/Python.git
+
+# Now run your cloned script
+cd Python
+python3 Day_of_week.py
+```
+
+## Mount external code to container
+
+Clone the code to the host then mount to container
+
+```bash
+# Clone code on the host
+docker run --name my_devops_toolkit -v "$(pwd)":/root/python_workspace --network host -it devops-toolkit:latest
+# Run the python code as usual
+```