feat(self-check): add Docker socket existence check

internal/helper/docker.go

@@ -9,3 +9,14 @@ import (
 func InNginxUIOfficialDocker() bool {
 	return cast.ToBool(os.Getenv("NGINX_UI_OFFICIAL_DOCKER"))
 }
+
+func DockerSocketExists() bool {
+	if !InNginxUIOfficialDocker() {
+		return false
+	}
+	_, err := os.Stat("/var/run/docker.sock")
+	if os.IsNotExist(err) {
+		return false
+	}
+	return true
+}

internal/self_check/docker.go

@@ -0,0 +1,17 @@
+package self_check
+
+import (
+	"github.com/0xJacky/Nginx-UI/internal/helper"
+)
+
+func CheckDockerSocket() error {
+	if !helper.InNginxUIOfficialDocker() {
+		return nil
+	}
+
+	if !helper.DockerSocketExists() {
+		return ErrDockerSocketNotExist
+	}
+
+	return nil
+}

internal/self_check/errors.go

@@ -17,4 +17,5 @@ var (
 	ErrStreamAvailableNotExist          = e.New(4048, "Streams-available directory not exist")
 	ErrStreamEnabledNotExist            = e.New(4049, "Streams-enabled directory not exist")
 	ErrNginxConfNotIncludeConfD         = e.New(4050, "Nginx conf not include conf.d directory")
+	ErrDockerSocketNotExist             = e.New(4051, "Docker socket not exist")
 )

internal/self_check/self_check.go

@@ -3,6 +3,7 @@ package self_check
 import (
 	"errors"
 
+	"github.com/0xJacky/Nginx-UI/internal/helper"
 	"github.com/uozi-tech/cosy"
 )
 
@@ -53,6 +54,12 @@ func init() {
 	for _, task := range selfCheckTasks {
 		selfCheckTaskMap[task.Name] = task
 	}
+	if helper.InNginxUIOfficialDocker() {
+		selfCheckTasks = append(selfCheckTasks, &Task{
+			Name:      "Docker-Socket",
+			CheckFunc: CheckDockerSocket,
+		})
+	}
 }
 
 func Run() (reports Reports) {