Support different ports on the other servers

NOTE: I don't know how to do this with php

Author: Edward Muller

server.go

@@ -85,8 +85,12 @@ func handleComments(w http.ResponseWriter, r *http.Request) {
 }
 
 func main() {
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "3000"
+	}
 	http.HandleFunc("/comments.json", handleComments)
 	http.Handle("/", http.FileServer(http.Dir("./public")))
 	log.Println("Server started: http://localhost:3000")
-	log.Fatal(http.ListenAndServe(":3000", nil))
+	log.Fatal(http.ListenAndServe(":"+port, nil))
 }

server.py

@@ -9,6 +9,7 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 import json
+import os
 from flask import Flask, Response, request
 
 app = Flask(__name__, static_url_path='', static_folder='public')
@@ -29,4 +30,4 @@ def comments_handler():
     return Response(json.dumps(comments), mimetype='application/json', headers={'Cache-Control': 'no-cache'})
 
 if __name__ == '__main__':
-    app.run(port=3000)
+    app.run(port=os.environ.get("PORT",3000))

server.rb

@@ -11,10 +11,12 @@
 require 'webrick'
 require 'json'
 
-puts 'Server started: http://localhost:3000/'
+port = ENV['PORT'].nil? ? 3000 : ENV['PORT'].to_i
+
+puts "Server started: http://localhost:#{port}/"
 
 root = File.expand_path './public'
-server = WEBrick::HTTPServer.new :Port => 3000, :DocumentRoot => root
+server = WEBrick::HTTPServer.new :Port => port, :DocumentRoot => root
 
 server.mount_proc '/comments.json' do |req, res|
   comments = JSON.parse(File.read('./comments.json'))