minecraft.horrific.dev is a dashboard / download page for various tweaks and modifications to Minecraft's resource files. This site provides configurable world downloads, resource packs, and data packs through an intuitive frontend allowing the user to select the features they need.
To learn more about how these data packs work, "Minecraft Data Pack Programming" provides a thorough introduction.
This site is powered by horrificdev/minecraft-packager, an extensible packager framework for Minecraft resource/data packs. This allows for powerful dynamic code generation using Nunjucks in the datapacks to reduce repetition and enable more concise functionality.
Once you've created a project and installed dependencies with npm install (or pnpm install), start a development server:
npm run dev