feat(radar): add hub.docker.com (#3270)

assets/radar-rules.js

@@ -557,4 +557,15 @@
             },
         ],
     },
+    'docker.com': {
+        _name: 'Docker',
+        hub: [
+            {
+                title: '镜像有新 Build',
+                docs: 'https://docs.rsshub.app/program-update.html#docker-hub',
+                source: ['/r/:owner/:image', '/r/:owner/:image/tags', '/_/:image'],
+                target: (params) => `/dockerhub/build/${params.owner ? params.owner : 'library'}/${params.image}`,
+            },
+        ],
+    },
 });

docs/program-update.md

@@ -54,7 +54,13 @@ pageClass: routes
 
 ### 镜像有新 Build
 
-<Route author="HenryQW" example="/dockerhub/build/wangqiru/ttrss" path="/dockerhub/build/:owner/:image/:tag?" :paramsDesc="['镜像作者', '镜像名称', '镜像标签，默认 latest']"/>
+<Route author="HenryQW" example="/dockerhub/build/wangqiru/ttrss" path="/dockerhub/build/:owner/:image/:tag?" :paramsDesc="['镜像作者', '镜像名称', '镜像标签，默认 latest']" radar="1"/>
+
+::: warning 注意
+
+官方镜像的 owner 填写 library, 如: https://rsshub.app/dockerhub/build/library/mysql
+
+:::
 
 ## F-Droid