chore: allow to generate "hello world" app on Golang

Part of #9

Author: php-coder

examples/go/app.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Listen on 3000")
+}

examples/go/endpoints.yaml

@@ -0,0 +1 @@
+../js/endpoints.yaml

src/cli.js

@@ -135,8 +135,8 @@ if (!fs.existsSync(destDir)) {
     fs.mkdirSync(destDir, {recursive: true});
 }
 
+createApp(destDir, argv.lang, config);
 if (argv.lang === 'js') {
-    createApp(destDir, argv.lang, config);
     createEndpoints(destDir, routesFile, config);
     createPackageJson(destDir, 'package.json');
 }
@@ -148,5 +148,12 @@ if (argv.lang === 'js') {
 to install its dependencies and
   export DB_NAME=db DB_USER=user DB_PASSWORD=secret
   npm start
-afteward to run it`);
+afteward to run`);
+} else if (argv.lang === 'go') {
+    console.info(`Use
+  go run app.go
+or
+  go build -o app
+  ./app
+to build and run it`)
 }

src/templates/app.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Listen on 3000")
+}