docs: add repository url to package.json

Author: zhensherlock

package.json

@@ -62,6 +62,10 @@
     "typescript": "^5.8.3",
     "vitest": "^3.2.4"
   },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/my-mcp-hub/doc-mcp-server.git"
+  },
   "publishConfig": {
     "access": "public",
     "registry": "https://registry.npmjs.org"