Uppercase environment variables

Issue #7

Author: Сергей Трегуб

ProjectTemplates/ReferenceProject/appsettings.json

@@ -13,7 +13,7 @@
       {
         "Name": "File",
         "Args": {
-          "path": "%AppData%/Logs/ReferenceProject.log",
+          "path": "%APPDATA%/Logs/ReferenceProject.log",
           "rollOnFileSizeLimit": true,
           "fileSizeLimitBytes": 10485760,
           "retainedFileCountLimit": 10,
@@ -34,7 +34,7 @@
   },
   "Products": {
     "TempFolder": "%TEMP%",
-    "BackendServiceUrl": "http://%gateway%/backend"
+    "BackendServiceUrl": "http://%GATEWAY%/backend"
   },
   "AllowedHosts": "*",
   "Urls": "http://localhost:5000"