feat(branding): customize Gita platform experience

Assisted-by: Codex:GPT-5

contrib/roncarve/README.md

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+# Gita 本地 Docker
+
+启动：
+
+```powershell
+docker compose -f contrib/roncarve/compose.local.yaml up -d --build
+```
+
+访问：<http://localhost:3300>
+
+首次启动会进入安装页面。完成初始化后，管理员账号和数据保存在 `roncarve-gita-local-data` 卷中；SSH 地址为 `ssh://git@localhost:2222`。
+
+停止但保留数据：
+
+```powershell
+docker compose -f contrib/roncarve/compose.local.yaml down
+```

contrib/roncarve/compose.local.yaml

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+services:
+  gita:
+    build:
+      context: ../..
+      dockerfile: Dockerfile
+    image: roncarve/gita:1.27.2-local
+    container_name: roncarve-gita-local
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:3300:3000"
+      - "127.0.0.1:2222:22"
+    environment:
+      USER_UID: "1000"
+      USER_GID: "1000"
+      GITEA_WORK_DIR: /data/gita
+      GITEA_CUSTOM: /data/gita
+      GITEA____APP_NAME: Gita 代码协作平台
+      GITEA__database__DB_TYPE: sqlite3
+      GITEA__database__PATH: /data/gita/gita.db
+      GITEA__server__PROTOCOL: http
+      GITEA__server__HTTP_ADDR: 0.0.0.0
+      GITEA__server__HTTP_PORT: "3000"
+      GITEA__server__SSH_DOMAIN: localhost
+      GITEA__server__SSH_PORT: "2222"
+      GITEA__server__ROOT_URL: http://localhost:3300/
+      GITEA__service__DISABLE_REGISTRATION: "true"
+      GITEA__service__ENABLE_PASSKEY_AUTHENTICATION: "false"
+      GITEA__openid__ENABLE_OPENID_SIGNIN: "false"
+      GITEA__openid__ENABLE_OPENID_SIGNUP: "false"
+      GITEA__ui__DEFAULT_THEME: gitea-light
+      GITEA__ui_0x2E_meta__AUTHOR: Hainan Roncarve Technology Co., Ltd.
+      GITEA__ui_0x2E_meta__DESCRIPTION: Gita 代码协作平台
+      GITEA__ui_0x2E_meta__KEYWORDS: roncarve,gita,go,git,code-collaboration
+    volumes:
+      - roncarve-gita-local-data:/data
+
+volumes:
+  roncarve-gita-local-data: