set url quotes based on template literal placeholder use

npm/ng-packs/packages/schematics/src/commands/api/files-service/proxy/__namespace@dir__/__name@kebab__.service.ts.template

@@ -13,7 +13,7 @@ export class <%= name %>Service {
       method: '<%= body.method %>',<% 
       if (body.responseType === 'string') { %>
       responseType: 'text',<% } %>
-      url: `/<%= body.url %>`,<%
+      url: <%= body.url %>,<%
       if (body.params.length) { %>
       params: { <%= body.params.join(', ') %> },<% }
       if (body.body) { %>

npm/ng-packs/packages/schematics/src/models/method.ts

@@ -70,6 +70,11 @@ export class Body {
 
   constructor(options: BodyOptions) {
     Object.assign(this, options);
+    this.setUrlQuotes();
+  }
+
+  private setUrlQuotes() {
+    this.url = /{/.test(this.url) ? `\`/${this.url}\`` : `'/${this.url}'`;
   }
 }