add dev mode support

rust/src_webpack/src/ota.ts

@@ -1,3 +1,6 @@
+declare var PUBLIC_URL: string;
+
+
 export function uploadFile() {
   var file1 = document.getElementById("file1") as HTMLInputElement;
   var loaded_n_total = document.getElementById("loaded_n_total");
@@ -29,7 +32,7 @@ export function uploadFile() {
     status.innerHTML = ajax.responseText;
     answer.innerHTML = "aborted";
   }, false);
-  ajax.open("POST", "/ota");
+  ajax.open("POST", PUBLIC_URL+"/ota");
   ajax.send(file);
 }
 
@@ -45,7 +48,7 @@ let firmware_buildtime = document.getElementById("firmware_buildtime") as HTMLDi
 let firmware_githash = document.getElementById("firmware_githash") as HTMLDivElement;
 
 document.addEventListener('DOMContentLoaded', function() {
-  fetch("/version")
+  fetch(PUBLIC_URL+"/version")
   .then(response => response.json())
   .then(json => json as VersionInfo)
   .then(versionInfo => {