Update README.md

README.md

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-# Python
+# Python-3.9 Docker Container
 
-Python-3.9 alpine linux image with added files used by my standard cronjob scripts
+Python-3.9 alpine linux image with added files used by my standard cronjob scripts. Dummy ssh keys are included. Replace in actual project if needed. This container includes ssh, mysql, read/write xls/xlsx and the pudb python debugger.
+
+This contianer will run the scrpipt named `script.py`.
+
+How install [docker](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04) and [docker-compose](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-compose-on-ubuntu-20-04).
+
+## To only Build container
+```
+docker-compose Build
+```
+
+## To Build (if needed) and Run contianer
+```
+docker-compose up
+```
+
+## To Build (if needed) and Run container in background
+```
+docker-compose up -d
+```
+
+## To Run container with command prompt
+```
+docker-compose run --entrypoint=/bin/sh python-app
+```
+
+## To enter running container with command prompt
+```
+docker-compose exec --entrypoint=/bin/sh python-app
+```
+
+## To view container logs
+```
+docker-compose logs python-app
+```
+
+## To monitor container logs (when container started with -d)
+```
+docker-compose logs -f python-app
+```
+
+# Customzing for your own app
+Replace the contents of the `app` folder with your python script(s). If the main script is named `script.py` no additonal changes are needed. 
+
+If your script has a different name then modify the last line of  `docker-compose.yml` and change `entrypoint` to reference your script.