Install a LOPA - Life of Plants & Animals 1.12 server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → LOPA - Life of Plants & Animals 1.12)
I've used quite a few different hosting services over the last few years, ScalaCube definitely has to be one of the better ones with just a couple small quirks that I can easily get over. During server set-up there was very little transparency as to what was going on in the background in comparison to other server hosts in my personal experience. Other than that; the hosting has been fantastic. No lag, constant up-time to where me and my friends can all enjoy our server whenever we'd like to. Mod incorporation is honestly seamless, click a few buttons and let it rip. As long as you're launching your correct Mod(s)/Loader then you'll have no issue whatsoever accessing your server.
Price-wise it can seem a little steep, but get these guys on a 50% off coupon and it's well worth it.