Eaglercraft 1.12 2 Github Info
Look for a file named something like EaglercraftX1.12_Offline_Download.html . This is a single file that contains the entire game (assets, sounds, and logic). Download this file.
Clone the server zip to a free Oracle Cloud VM or a cheap AWS EC2 instance. Run the proxy and point it to your own Minecraft 1.12.2 Spigot server. eaglercraft 1.12 2 github
Upload the EaglercraftX_Offline.html file to a public GitHub repository. Look for a file named something like EaglercraftX1