Add native NixOS deployment and UI-managed provider credentials

web/src/Accounts.tsx

@@ -453,7 +453,7 @@ function ConnectForm({
           {copied ? "Copied" : "Copy callback URL"}
         </button>
         <p>
-          Set <code>ENABLEBANKING_REDIRECT_URL</code> on your server and
+          Configure your application in <a href="#settings">Settings</a> and
           register this exact URL with Enable Banking. It must match exactly,
           including scheme, hostname, port and path.
         </p>
@@ -494,8 +494,9 @@ function ConnectForm({
         </Field>
         {!state.status.banking_configured && (
           <p className="muted small">
-            Set the Enable Banking application ID, signing key and callback URL
-            on your server first. Credentials never enter this browser form.
+            Add your Enable Banking application ID and private key in{" "}
+            <a href="#settings">Settings</a> first, then return here to
+            authorize your bank.
           </p>
         )}
         <button