To build:
```
flatpak-builder --force-clean --user --install-deps-from=flathub --repo=repo --install builddir me.theentropyshard.teslauncher.yml
```

Launch either through application menu by searching "TESLauncher" or by `flatpak run me.theentropyshard.teslauncher`

To use OpenJ9 instead of downloading a JRE package from Mojang:
- Add instance
- Open context menu, choose "Edit"
- Under "Java installation" section insert `/app/lib/jvm/openj9/bin/java` into the text field
- Done, close a settings window and play Minecraft!