Add 'port' configuration option (fix #7)

config.go

@@ -9,6 +9,7 @@ import (
 
 // Configuration stores information retrieved from a configuration file
 type Configuration struct {
+	port int
 	sites_dir string
 }
 
@@ -21,6 +22,7 @@ func parseConfig(path string, config *Configuration) {
 		log.Panic("Failed to parse config:", err)
 	}
 	file.Close()
+	config.port = int(data["port"].(float64)) // this conversion makes no sense
 	config.sites_dir = data["sites_dir"].(string)
 }
 

config.json

@@ -1,3 +1,4 @@
 {
+	"port": 7575,
 	"sites_dir": "./sites"
 }

main.go

@@ -60,6 +60,6 @@ func main()  {
 		go handler(data) // Run the handler
 		fmt.Fprint(w, "Received!")
 	})
-	log.Printf("Starting Lapis Deploy...")
-	log.Fatal(http.ListenAndServe(":7575", nil))
+	log.Printf("Starting Lapis Deploy on port %d...", configuration.port)
+	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", configuration.port), nil))
 }