Add CORS support and update redirect behavior

src/ui/main.py

@@ -29,6 +29,7 @@ from docker.errors import (
 )
 from flask import (
     Flask,
+    Response,
     flash,
     jsonify,
     redirect,
@@ -426,6 +427,7 @@ def setup():
                     "REVERSE_PROXY_URL": request.form["ui_url"] or "/",
                     "AUTO_LETS_ENCRYPT": request.form.get("auto_lets_encrypt", "no"),
                     "INTERCEPTED_ERROR_CODES": "400 404 405 413 429 500 501 502 503 504",
+                    "USE_CORS": "yes",
                 },
                 request.form["server_name"],
                 request.form["server_name"],
@@ -433,7 +435,7 @@ def setup():
             kwargs={"operation": "new"},
         ).start()
 
-        return redirect(url_for("loading", next=url_for("services"), message=f"Creating service {request.form['server_name']} for the web UI"))
+        return Response(status=200)
 
     return render_template(
         "setup.html",

src/ui/templates/setup.html

@@ -1693,15 +1693,22 @@
               this.sslCheck.getAttribute("aria-checked") === "true" ? "s" : ""
             }://${this.servInp.value}${this.urlInp.value}`;
 
-            fetch(api, {
+            fetch(window.location.href, {
               method: "POST",
               body: new FormData(this.formEl),
             })
               .then((res) => {
                 if (res.status === 200) {
-                  setTimeout(() => {
-                    window.location.href = api;
-                  }, 400);
+                  setInterval(() => {
+                    fetch(api, {
+                      cache: "no-cache",
+                    })
+                      .then((res) => {
+                        if (res.status === 200 || res.status === 301) {
+                          window.location.replace(api);
+                        }
+                      });
+                  }, 5000);
                 }
               })
               .catch((err) => {