This image is based on openjdk:alpine, adding just ~40 Mb to the total image size with just the required binaries.
Start a container based on this image adding the necessary files and folders to /minecraft volume and exposing the required ports (usually 25565).
Minecraft and Spigot are copyright of their owners; this is just a Dockerfile to facilitate creating a Spigot server. I'm not the owner nor represent Spigot, Minecraft, nor Mojang.