Install a Parasites, SCPs, Guns, and More server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → Parasites, SCPs, Guns, and More)
Server works great, Loads quickly and has great management tools. Supports tons of mod packs with super easy install. I havent tried to custom build a pack and load it yet but as far as the many packs on curseforge and FTB things run smoothly!