How to run:
1. In Intellji, go to settings > Build, Execution, and Deployment > Gradle.
2. Under "Build and run", select Intellji IDEA.
3. Go to main, which is under src/main/java/Main.java
4. In Intellji, run the green play button in the top right corner. The server should 
start, telling you it is running Javalin on http://localhost:7070.
5. Visit http://localhost:7070 on Google Chrome to use the application. If your first usage prompts and error on the UI, clear your cookies.