feat: added prometheus metrics support

test/main.spec.ts

@@ -31,6 +31,7 @@ import {
   getGatewayOfStAppsBackend,
   getTemplateView,
   generateListener,
+  generateMetricsServer,
   getContainers,
 } from '../src/main';
 import {resolve} from 'path';
@@ -399,6 +400,16 @@ Please check if docker is running and Node.js can access the docker socket (/var
     return true;
   }
 
+  @test
+  async 'include metrics config'() {
+    expect(await generateMetricsServer(true)).length.to.be.greaterThan(1);
+  }
+
+  @test
+  async 'omit metrics config'() {
+    expect(await generateMetricsServer(false)).to.equal('');
+  }
+
   @test
   'create listener faulty config'() {
     expect(