删除服务端材质渲染功能及system_config表，转为环境变量配置，初步配置管理员功能

docker-compose.yml

@@ -12,6 +12,17 @@ services:
     ports:
       - "${APP_PORT:-8080}:8080"
     environment:
+      # 站点配置
+      - SITE_NAME=${SITE_NAME:-CarrotSkin}
+      - SITE_DESCRIPTION=${SITE_DESCRIPTION:-一个优秀的Minecraft皮肤站}
+      - REGISTRATION_ENABLED=${REGISTRATION_ENABLED:-true}
+      - DEFAULT_AVATAR=${DEFAULT_AVATAR:-}
+      # 用户限制配置
+      - MAX_TEXTURES_PER_USER=${MAX_TEXTURES_PER_USER:-50}
+      - MAX_PROFILES_PER_USER=${MAX_PROFILES_PER_USER:-5}
+      # 积分配置
+      - CHECKIN_REWARD=${CHECKIN_REWARD:-10}
+      - TEXTURE_DOWNLOAD_REWARD=${TEXTURE_DOWNLOAD_REWARD:-1}
       # 服务器配置
       - SERVER_PORT=:8080
       - SERVER_MODE=${SERVER_MODE:-release}