Thanks to Zephyrrus for the hints about nunjucks, sort of (he did not really give out any specific hints to me, I stalked his fork, lmao).
* Replaced Handlebars with Nunjucks.
* Replaced all static HTML files with their NJK-equivalent (excluding error pages).
* Renamed "albumDomain" to "homeDomain" in config.sample.js (make sure you update your config.js too).
* Updated dependencies: knex and eslint-plugin-import (dev).
* Updated vscode's settings.json (I may update this again very soon).
* Added VSCode settings to git repo. Now you can match yours with mine, if you want.
* Added .jsbeautifyrc for js-beautify (to be used by VSCode's Beautify extension).
* Refactored all instances of require('**/*.js') with require('**/*') wherever applicable (basically gotten rid of the .js extension).
* Refactored path in all instances of require() wherever applicable.
* Sorted instances of require() wherever applicable.
* Fixed 500 HTTP error trying to load an error page for 505 HTTP error.
* Removed special treatement of NoJS page from uploadsController.processFilesForDisplay().
* Updated version string of all static files.
* Beautified all HTML, HANDLEBARS and CSS files.
* Refactored the structure of footer links in homepage and No-JS uploader. This should now fix homepage going out-of-bound in smaller screens.
* Added CSS prefixes wherever applicable.
* Improved back-end side of No-JS uploader. This will now handle errors properly.
* No-JS uploader will now show max file size.
* No-JS uploader will now show a proper message when private mode is enabled and/or registration is disabled.
