A read only UI that shows the contents of the Postgres database table item.
The idea is to use a database tool such as psql to modify the database table and see the changes in the browser.
Start the application using mvn spring-boot:test-run or launch the TestApplication class in your IDE.
Look at the output for a row in the output like
Container is started (JDBC URL: jdbc:postgresql://localhost:64548/test?loggerLevel=OFF)
Grab the port number from there and run
psql -h localhost -p <port> --user test
enter test as the password and you can modify the database table e.g. as
insert into item VALUES (5,'Zucchini',12);
Any changes made in the database should immediately show up in the browser.
If you have a local postgres database up and running you can create the needed database and table using
createuser livedb -P
createdb livedb -O livedb
Then you can run the application by launching the Application class in your IDE or by running
mvn spring-boot:run
Connect to the local Postgres database in any way you like, e.g. using psql as above (but with livedb as username and password and the standard port)