fix quotes and indentation on docker-compose.yml

build.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+docker-compose -f docker-compose.build.yml build mindustry

docker-compose.yml

@@ -1,13 +1,13 @@
-version: '3.1'
+version: "3.1"
 
 services:
   mindustry:
-    image: thehuntedpie/mindustry:4.0-alpha-56
+    image: "thehuntedpie/mindustry:4.0-alpha-56"
     ports:
-      - '6567:6567/tcp'
-      - '6567:6567/udp'
+      - "6567:6567/tcp"
+      - "6567:6567/udp"
     tty: true
     stdin_open: true
     restart: always
     volumes:
-       -  "/data/mindustry:/root/.mindustry"
+      - "/data/mindustry:/root/.mindustry"