Overhaul for get-server v. 2.0.0

Since get-server downloads its own jarfile this commit overhauls a lot
of the minecraft deploy to match the new strategy. It also updates the
README and adds makefile targets for a few new commands.

Makefile

@@ -1,27 +1,13 @@
 SHELL := /bin/bash
 
-IMAGE ?= $(shell cat IMAGE):$(shell cat VERSION)
-IMAGE_LATEST ?= $(shell cat IMAGE):latest
-PWD ?= $(shell pwd)
+include .gitlab/Makefile
 
-.PHONY: buildx-context
-buildx-context:
-	docker buildx create --name arm64 --use --platform linux/amd64,linux/arm64
-
-.PHONY: buildx-clear
-buildx-clear:
-	docker buildx rm arm64
-
-.PHONY: build
-build:
-	docker buildx build --load . -t $(IMAGE)
-	@docker buildx build --load . -t $(IMAGE_LATEST) 
-
-.PHONY: push
-push:
-	docker buildx build --platform linux/amd64 --push . -t $(IMAGE)
-	@docker buildx build --platform linux/amd64 --push . -t $(IMAGE_LATEST)
+.PHONY: get-server
+get-server:
+	@mkdir -p world
+	@echo 'eula=true' > world/eula.txt
+	@docker run -it -e SERVER_VERSION=1.17.1 -v $(PWD)/world:/downloads ducoterra/get-minecraft:latest
 
 .PHONY: run
 run:
-	docker run -it -v $(PWD):/mc_data $(IMAGE) bash
+	docker-compose run --service-ports minecraft