Handle SIGTERM as a valid stop signal for a graceful shutdown since it's the default stop code for the Docker

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Handle the case when there is no textures property in Mojang's response.
+- Handle `SIGTERM` as a valid stop signal for a graceful shutdown since it's the default stop code for the Docker.
 
 ### Changed
 - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.round_time` timer will not be recorded if the iteration was

http/http.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/signal"
 	"strings"
+	"syscall"
 
 	"github.com/gorilla/mux"
 	"github.com/mono83/slf"
@@ -45,7 +46,7 @@ func StartServer(server *http.Server, logger slf.Logger) {
 
 func waitForExitSignal() os.Signal {
 	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, os.Interrupt, os.Kill)
+	signal.Notify(ch, os.Interrupt, syscall.SIGTERM, os.Kill)
 
 	return <-ch
 }