how_to_modify.txt

1. Run "sudo docker compose down"
2. Run "sudo docker ps" to check docker container running.
3. No docker container should be running.
4. Run "sudo docker images" to see which images are installed.
5. Note the image hash and then run "sudo docker rmi xxx", for each of the images, where xxx is the image id.
6. Run "sudo docker container prune" -->> this is not needed as "sudo docker compose down" removes images running in containers.
7. Run "sudo docker compose up -d" --> this will start up the required images in a detached manner.
8. Run "sudo docker compose logs -f" --> this will show the logs of the containers; ctrl-c to stop the logging. Same command to restart the logging.
9. Any additions to the database models (table additions) are accomplished by modifying the models.py file. These tables will automatically be added 
to the postgres database when stopping/starting the containers following steps 1 to 8 above). For this operation (adding of table defintiions to models.py), 
there is no need to run the following commands.
"sudo docker exec -it adminpls python3 -m flask db migrate"
followed by the
"sudo docker exec -it adminpls python3 -m flask db upgrade"
10. The above commmands are only required when deleting table defintions from models.py. When they are run, the postgres database will be updated to
reflect the deletions made in the models.py file.