Remove initial server health check and bump Harbor versions

src/web/api.js

@@ -50,6 +50,11 @@ export const api = {
   state: () => request('/api/state'),
   version: () => request('/api/version'),
   subscription: {
+    validate: (url, { signal } = {}) => request('/api/subscription/validate', {
+      method: 'POST',
+      body: JSON.stringify({ url }),
+      signal,
+    }),
     fetch: (url) => request('/api/subscription/fetch', {
       method: 'POST',
       body: JSON.stringify({ url }),