Implemented REST Mock tool

Co-authored-by: widlam <mikolaj.widla@gmail.com>
Co-authored-by: Adam Bem <adam.bem@zoho.eu>
Reviewed-on: #231
Reviewed-by: Adam Bem <bema@noreply.example.com>
Co-authored-by: Mikolaj Widla <widlam@noreply.example.com>
Co-committed-by: Mikolaj Widla <widlam@noreply.example.com>

Frontend/nginx.conf

@@ -18,6 +18,11 @@ server {
         proxy_set_header Host $host;
     }
 
+    location /api/mock {
+        proxy_pass http://xmltools-mocked-services:8097/api/mock;
+        proxy_set_header Host $host;
+    }
+
     location /libxml/ {
         proxy_pass http://xmltools-libxml-backend/;
         proxy_set_header Host $host;