In order to setup ToDo, download the archive from here and extract it to an arbitrary location.
Make sure you have Java JRE or JDK v8 or higher installed.
Open a terminal, navigate to where the extracted files are located and execute
java -jar ./jetty-runner.jar --port 9090 ./Todo-App.war.
http://localhost:9090 in a web browser of your choice.
You should see the login form of ToDo which looks like this:
You can login with the default admin account: firstname.lastname@example.org as email and admin as password. Maybe, login once and play around a little to get a feel of the application before learning it.
To setup alex, in the terminal, navigate to where the ALEX-*.*.war is located and execute
java -jar alex.war --port 8000,
wait a moment and open
http://localhost:8000 in a web browser.
You should see the index page where you are asked to login or create a new account.
Create a new account or alternatively authenticate with the admin account using email@example.com as email and admin as password. Press the login-button to finish the login process which leads to the projects overview on success.