Update Minecraft

[wlraider70]

How can I update Minecraft itself?
https://www.spigotmc.org says to 'java -jar BuildTools.jar'
But that jar doesn't seem to be in the image.

[neffets]

Set the docker env variable MINECRAFT_VERSION
similiar to:

docker run -e MINECRAFT_VERSION=1.15.2 -e MINECRAFT_EULA=true -e DEFAULT_OP=Icke -v 1-15-server/:/opt/minecraft -v 1-15-worlds:/var/lib/minecraft dlord/spigot