[NodeJS] Auto populate config using schema servers.url (#6980)

* [NodeJS] nodejs-express-server fix /api-docs path

* Auto populate config using schema servers.url

* [NodeJS] Auto populate config port 3000

Author: kmturley

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSExpressServerCodegen.java

@@ -46,6 +46,7 @@ public class NodeJSExpressServerCodegen extends DefaultCodegen implements Codege
 
     private static final Logger LOGGER = LoggerFactory.getLogger(NodeJSExpressServerCodegen.class);
     public static final String EXPORTED_NAME = "exportedName";
+    public static final String SERVER_HOST = "serverHost";
     public static final String SERVER_PORT = "serverPort";
 
     protected String apiVersion = "1.0.0";
@@ -334,6 +335,11 @@ public void preprocessOpenAPI(OpenAPI openAPI) {
         String port = URLPathUtils.getPort(url, defaultServerPort);
         String basePath = url.getPath();
 
+        if (additionalProperties.containsKey(SERVER_HOST)) {
+            host = additionalProperties.get(SERVER_HOST).toString();
+        }
+        this.additionalProperties.put(SERVER_HOST, host);
+
         if (additionalProperties.containsKey(SERVER_PORT)) {
             port = additionalProperties.get(SERVER_PORT).toString();
         }

modules/openapi-generator/src/main/resources/nodejs-express-server/config.mustache

@@ -2,9 +2,9 @@ const path = require('path');
 
 const config = {
   ROOT_DIR: __dirname,
-  URL_PORT: 3000,
-  URL_PATH: 'http://localhost',
-  BASE_VERSION: 'v2',
+  URL_PORT: {{#serverPort}}{{serverPort}}{{/serverPort}}{{^serverPort}}3000{{/serverPort}},
+  URL_PATH: '{{#serverHost}}{{serverHost}}{{/serverHost}}{{^serverHost}}http://localhost{{/serverHost}}',
+  BASE_VERSION: '{{#contextPath}}{{contextPath}}{{/contextPath}}{{^contextPath}}v2{{/contextPath}}',
   CONTROLLER_DIRECTORY: path.join(__dirname, 'controllers'),
   PROJECT_DIR: __dirname,
 };