✨ Improve public-uri handling

This enables use penpot under subdirectory

frontend/src/app/main/worker.cljs

@@ -6,17 +6,24 @@
 
 (ns app.main.worker
   (:require
-   [app.config :as cfg]
+   [app.config :as cf]
    [app.main.errors :as err]
    [app.util.worker :as uw]))
 
 (defonce instance (atom nil))
 
+(defn- update-public-uri!
+  [instance val]
+  (uw/ask! instance {:cmd :configure
+                     :key :public-uri
+                     :val val}))
+
 (defn init!
   []
-  (reset!
-   instance
-   (uw/init cfg/worker-uri err/on-error)))
+  (let [worker (uw/init cf/worker-uri err/on-error)]
+    (update-public-uri! worker @cf/public-uri)
+    (add-watch cf/public-uri ::worker-public-uri (fn [_ _ _ val] (update-public-uri! worker val)))
+    (reset! instance worker)))
 
 (defn ask!
   [message]