Add configuration values for address and port

Add (non-mandatory) configuration values to set address and port on which the web frontent will be served. If not set defaults will be applied.

main.go

@@ -8,7 +8,6 @@ import (
 	"log"
 	"net/http"
 	"os"
-	"strconv"
 	"strings"
 	"time"
 
@@ -24,38 +23,8 @@ var (
 	cachedServiceResults          []byte
 	cachedServiceResultsGzipped   []byte
 	cachedServiceResultsTimestamp time.Time
-	port                          int
-	host                          string
 )
 
-func init() {
-	// Customizing priority:
-	// (1) command line parameters will be preferred over
-	// (2) environment variables will be preferred over
-	// (3) application defaults
-
-	// set defaults for the case that neither an environment variable nor a
-	// command line parameter is passed
-	var defaultHost = ""
-	var defaultPort = 8080
-
-	// assume set if the is a valid port number
-	if p, err := strconv.Atoi(os.Getenv("GATUS_CONFIG_PORT")); err == nil && p > 0 {
-		defaultPort = p
-	}
-
-	// explicitly asked if the user has set a the environment variable to
-	// blank / empty in order to allow listening on all interfaces
-	if h, set := os.LookupEnv("GATUS_CONFIG_HOST"); set == true {
-		defaultHost = h
-	}
-
-	flag.IntVar(&port, "port", defaultPort, "port to listen (default: 8080)")
-	flag.IntVar(&port, "p", defaultPort, "port to listen (default: 8080 ; shorthand)")
-	flag.StringVar(&host, "host", defaultHost, "host to listen on (default all interfaces on host)")
-	flag.StringVar(&host, "h", defaultHost, "host to listen on (default all interfaces on host; shorthand)")
-}
-
 func main() {
 	flag.Parse()
 
@@ -71,9 +40,9 @@ func main() {
 		http.Handle("/metrics", promhttp.Handler())
 	}
 
-	log.Printf("[main][main] Listening on %s:%d", host, port)
+	log.Printf("[main][main] Listening on %s:%d\r\n", cfg.Web.Address, cfg.Web.Port)
 	go watchdog.Monitor(cfg)
-	log.Fatal(http.ListenAndServe(fmt.Sprintf("%s:%d", host, port), nil))
+	log.Fatal(http.ListenAndServe(fmt.Sprintf("%s:%d", cfg.Web.Address, cfg.Web.Port), nil))
 }
 
 func loadConfiguration() *config.Config {