Support Purpur and Pufferfish config repos & optimize server.properties handling (#3914)

examples/optimized-server-config/docker-compose.yml

@@ -0,0 +1,17 @@
+services:
+  mc:
+    image: itzg/minecraft-server
+    container_name: paper
+    environment:
+      EULA: "true"
+      TYPE: "PAPER"
+      VIEW_DISTANCE: 10
+      MEMORY: 2G
+      PAPER_CONFIG_REPO: "https://raw.githubusercontent.com/Alpha018/paper-config-optimized/main"
+    ports:
+      - "25565:25565"
+    volumes:
+      - mc-paper:/data
+    restart: unless-stopped
+volumes:
+  mc-paper: {}