Quick grammar fix: run -> runs
Set the mysql server to use the root password as used in the Flask application
Changed checking the MySQL server from using `docker run` to `docker exec` since you want to log in to the existing mysql container. Added the password as set by the previous `docker run` command.
Changed @app.route to `initdb`, the path used in later parts of the tutorial.
(cherry picked from commit 473930c972)
Replaced `docker-python` directory reference with `python-docker` to reduce confusion when following the tutorial. The tutorial establishes creating a `python-docker` directory, so proposing this change to maintain consistency with instructions.
* Fix CMD arguments
The previous CMD command doesn't actually start the service.
* Simplify (and fix) curl command
Previously it was specifying a lot of parameters that in our case are optional and IMO don't help with understanding what's going on.
Furthermore the previous command was asking for a `/test` page which we do not serve.
And finally it was using POST which is not supported in our app created in the previous step.
* Fix typo
