fixed proxy URL building issue

ionic.config.json

@@ -6,7 +6,7 @@
   "proxies": [
     {
       "path": "/mc-service",
-      "proxyUrl": "http://localhost:5000/mc/api/v1.0"
+      "proxyUrl": "http://localhost:5000/"
     }
   ],
   "type": "ionic-angular"

src/assets/config.json

@@ -5,7 +5,7 @@
   "backendApiRawtextPath": "rawtext",
   "backendApiValidReffPath": "validReff",
   "backendBaseUrl": "",
-  "backendProxyURl": "mc-service",
+  "backendProxyPath": "mc-service/mc/api/v1.0",
   "callidusProjectUrl": "https://www.projekte.hu-berlin.de/de/callidus",
   "developerMailTo": "mailto:sulzkons@hu-berlin.de",
   "localStorageKeyCorpora": "mc/corpora",

src/providers/helper/helper.ts

@@ -20,7 +20,7 @@ export class HelperProvider {
         this.http.get("assets/config.json").subscribe((config: object) => {
             HelperProvider.config = config;
             if (!HelperProvider.config["backendBaseUrl"]) {
-                HelperProvider.config["backendBaseUrl"] = location.protocol.concat("//").concat(window.location.hostname).concat(location.port ? `:${location.port}` : "").concat("/").concat(HelperProvider.config["backendProxyURl"]).concat("/");
+                HelperProvider.config["backendBaseUrl"] = location.protocol.concat("//").concat(window.location.hostname).concat(location.port ? `:${location.port}` : "").concat("/").concat(HelperProvider.config["backendProxyPath"]).concat("/");
             }
         });
     }