go.yml

source: clear
features:
  - go
nginx:
  root: public_html/public
  passenger:
    enabled: "on"
    app_start_command: env PORT=$PORT ./main
commands:
  - filename: main.go
    content: |
      package main

      import (
        "fmt"
        "net/http"
        "os"
        "runtime"
        "strings"
      )

      const html_text = `
      <!DOCTYPE html>
      <html>
      <head>
        <title>Go App</title>
        <link rel="stylesheet" href="//unpkg.com/bootstrap/dist/css/bootstrap.min.css">
      </head>
      <body class="p-5 text-center">
        <p><img src="//images.unsplash.com/photo-1465153690352-10c1b29577f8?fit=crop&w=200&h=200" 
            class="img-fluid rounded-circle"></p>
        <h1 class="mb-3">Hello, world!</h1>
        <p>Serving from Go version %s</p>
        <p class="text-muted">DOM Cloud</p>
      </body>
      </html>
      `

      func home(w http.ResponseWriter, req *http.Request) {
        w.Header().Set("Content-Type", "text/html")
        version := strings.Replace(runtime.Version(), "go", "", 1)
        fmt.Fprintf(w, html_text, version)
      }

      func main() {
        http.HandleFunc("/", home)
        port := os.Getenv("PORT")
        if port == "" {
          fmt.Print("PORT environment variable not set")
          os.Exit(1)
        }
        http.ListenAndServe("127.0.0.1:"+port, nil)
      }

  - go build main.go