moved builds to build directory

Author: mroote

Makefile

@@ -6,12 +6,12 @@ build:
 	go build -o factorio-server-linux/factorio-server-manager src/*
 	cp -r app/ factorio-server-linux/
 	cp conf.json.example factorio-server-linux/conf.json
-	zip -r $(HOME)/factorio-server-linux-x64.zip factorio-server-linux
+	zip -r build/factorio-server-linux-x64.zip factorio-server-linux
 	rm -rf factorio-server-linux
 	# Build Windows release
 	GOOS=windows GOARCH=386 go build -o factorio-server-windows/factorio-server-manager.exe src/*
 	cp -r app/ factorio-server-windows/
 	cp conf.json.example factorio-server-windows/conf.json
-	zip -r $(HOME)/factorio-server-windows.zip factorio-server-windows
+	zip -r build/factorio-server-windows.zip factorio-server-windows
 	rm -rf factorio-server-windows