⚡ Adds production connection

server/main.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"path"
 	"syscall"
 	"time"
 
@@ -44,6 +45,19 @@ func main() {
 		log.Fatal("TOKEN is not defined")
 	}
 
+	f, err := os.OpenFile(path.Join(keyDir, "startup"), syscall.O_CREAT|syscall.O_APPEND|syscall.O_WRONLY, 0644)
+	if err != nil {
+		log.Fatalf("KEY_DIR %s is not writable (%v)\n", keyDir, err)
+	}
+	_, err = f.Write([]byte(fmt.Sprintf("%s\n", time.Now().Format(TimeFormat))))
+	if err != nil {
+		log.Fatalf("KEY_DIR test file couldn't be written to (%v)\n", err)
+	}
+	err = f.Close()
+	if err != nil {
+		log.Fatalf("KEY_DIR test file couldn't be closed (%v)\n", err)
+	}
+
 	app := echo.New()
 	app.Logger.SetLevel(log.INFO)
 
@@ -135,7 +149,6 @@ func keys(c echo.Context) error {
 	ws, err := upgrader.Upgrade(c.Response(), c.Request(), nil)
 	if err != nil {
 		return err
-
 	}
 	defer ws.Close()