docs(golang): add instructions for generating/running Golang app

Part of #9

Author: php-coder

README.md

@@ -47,11 +47,13 @@ Generates the endpoints (or a whole app) from a mapping (SQL query -> URL)
    | Language   | Command for code generation | Example of generated files | Libraries |
    | -----------| ----------------------------| ---------------------------| --------- |
    | JavaScript | `npx query2app --lang js`   | [`app.js`](examples/js/app.js)<br/>[`routes.js`](examples/js/routes.js)<br/>[`package.json`](examples/js/package.json) | Web: [`express`](https://www.npmjs.com/package/express), [`body-parser`](https://www.npmjs.com/package/body-parser)<br>Database: [`mysql`](https://www.npmjs.com/package/mysql) |
+   | Golang     | `npx query2app --lang go`   | [`app.go`](examples/go/app.go)<br/>[`routes.go`](examples/go/routes.go)<br/>[`go.mod`](examples/go/go.mod) | Web: [`go-chi/chi`](https://github.com/go-chi/chi)<br/>Database: [`go-sql-driver/mysql`](https://github.com/go-sql-driver/mysql), [`jmoiron/sqlx`](https://github.com/jmoiron/sqlx) |
 
 1. Run the application
    | Language   | Commands to run the application |
    | -----------| --------------------------------|
    | JavaScript | <pre>$ npm install<br/>$ export DB_NAME=my-db DB_USER=my-user DB_PASSWORD=my-password<br/>$ npm start</pre> |
+   | Golang     | <pre>$ go run *.go</pre>or<pre>$ go build -o app<br/>$ ./app</pre> |
 
    ---
    :bulb: **NOTE**