Build spigot using buildtools (#67)

* Download buildtools

* Download buildtools

* Not a good idea to chmod /root

* Remove bukkit code

* fix jar not found

* Run start-minecraft as root (temp)

* Working buildtools

* Remove echo line

* Added more server properties, not working yet

* Show what server properties are being added

* Show what server properties are being added

* Add rcon.password

* Add max-world-size

* Added alot of server settings

* Expose rcon port

* Export home per itzg suggestion

* Update readme and server properties

* Env for building spigot from source

* Update readme

minecraft-server/Dockerfile

@@ -25,6 +25,7 @@ RUN useradd -M -s /bin/false --uid 1000 minecraft \
   && chown minecraft:minecraft /data /config /mods /plugins
 
 EXPOSE 25565
+EXPOSE 25575
 
 COPY start.sh /start
 COPY start-minecraft.sh /start-minecraft