Embed frontend dist into Go binary; remove frontend path from health

- New backend/embed package embeds frontend dist/ via //go:embed
- Go binary serves frontend from embedded FS (no external files needed)
- Dev mode uses placeholder dir (dev.txt) so Go compiles; Vite handles
  frontend in dev mode
- Makefile copies frontend/dist/ to backend/embed/dist/ during build
- Removed FRONTEND_DIR env var and filesystem serving fallback
- Removed frontend path from Health API response and Status page frontend
  section (only Served boolean remains)
- Removed frontendDir from Handler struct/constructor (unused)

.gitignore

@@ -1,6 +1,7 @@
 node_modules/
 dist/
 frontend/dist/
+backend/embed/dist/
 
 *.exe
 *.test

Makefile

@@ -15,15 +15,23 @@ backend:
 frontend:
 	cd frontend && npm run build
 
-build: backend frontend
+.PHONY: copyfrontend
+copyfrontend:
+	rm -rf backend/embed/dist
+	mkdir -p backend/embed/dist
+	cp -r frontend/dist/. backend/embed/dist/
+
+build: frontend copyfrontend backend
 
 run:
 	cd backend && DEV_DEPLOY_DIR=$(DEV_DEPLOY_DIR) SERVERFILE_DIR=$(SERVERFILE_DIR) MODS_DIR=$(MODS_DIR) CFG_DIR=$(CFG_DIR) PROFILES_DIR=$(PROFILES_DIR) DATA_DIR=$(DATA_DIR) GIN_MODE=debug go run ./cmd/server/
 
 dev:
+	mkdir -p backend/embed/dist
+	test -f backend/embed/dist/dev.txt || touch backend/embed/dist/dev.txt
 	cd backend && DEV_DEPLOY_DIR=$(DEV_DEPLOY_DIR) SERVERFILE_DIR=$(SERVERFILE_DIR) MODS_DIR=$(MODS_DIR) CFG_DIR=$(CFG_DIR) PROFILES_DIR=$(PROFILES_DIR) DATA_DIR=$(DATA_DIR) GIN_MODE=debug go run ./cmd/server/ &
 	cd frontend && npm run dev
 
 clean:
 	rm -f backend/arma3-web-server
-	rm -rf frontend/dist
+	rm -rf frontend/dist backend/embed/dist

backend/cmd/server/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"io/fs"
 	"log"
 	"net/http"
 	"os"
@@ -10,6 +11,7 @@ import (
 	"syscall"
 	"time"
 
+	"arma3-web-server/embed"
 	"arma3-web-server/internal/api"
 	"arma3-web-server/internal/services"
 
@@ -24,7 +26,6 @@ func main() {
 	cfgDir := mustAbs(getEnv("CFG_DIR", filepath.Join(devDeploy, "serverfiles", "cfg")))
 	profilesDir := mustAbs(getEnv("PROFILES_DIR", filepath.Join(devDeploy, "serverfiles", "profiles")))
 	listen := getEnv("LISTEN", ":8080")
-	frontendDir := mustAbs(getEnv("FRONTEND_DIR", filepath.Join("..", "frontend", "dist")))
 
 	log.Printf("data dir:       %s", dataDir)
 	log.Printf("serverfile dir: %s", serverfileDir)
@@ -55,16 +56,19 @@ func main() {
 
 	r := gin.Default()
 
-	if fi, err := os.Stat(frontendDir); err == nil && fi.IsDir() {
-		r.Static("/assets", filepath.Join(frontendDir, "assets"))
-		r.StaticFile("/favicon.ico", filepath.Join(frontendDir, "favicon.ico"))
-		r.NoRoute(func(c *gin.Context) {
-			c.File(filepath.Join(frontendDir, "index.html"))
-		})
-		log.Printf("serving frontend from %s", frontendDir)
+	subFS, subErr := fs.Sub(embed.Frontend, "dist")
+	if subErr == nil {
+		if _, err := subFS.Open("index.html"); err == nil {
+			r.StaticFS("/assets", http.FS(subFS))
+			r.StaticFileFS("/favicon.ico", "favicon.ico", http.FS(subFS))
+			r.NoRoute(func(c *gin.Context) {
+				c.FileFromFS("index.html", http.FS(subFS))
+			})
+			log.Print("serving embedded frontend")
+		}
 	}
 
-	handler := api.New(settings, configMgr, modlistMgr, process, steamcmd, scheduler, streamer, dataDir, serverfileDir, modsDir, cfgDir, profilesDir, frontendDir)
+	handler := api.New(settings, configMgr, modlistMgr, process, steamcmd, scheduler, streamer, dataDir, serverfileDir, modsDir, cfgDir, profilesDir)
 	handler.SetupRoutes(r)
 
 	// Startup auto-tasks

backend/embed/embed.go

@@ -0,0 +1,6 @@
+package embed
+
+import "embed"
+
+//go:embed dist
+var Frontend embed.FS

backend/internal/api/health.go

@@ -50,8 +50,7 @@ type SteamCMDHealth struct {
 }
 
 type FrontendHealth struct {
-	Served bool   `json:"served"`
-	Path   string `json:"path"`
+	Served bool `json:"served"`
 }
 
 func (h *Handler) Health(c *gin.Context) {
@@ -60,7 +59,6 @@ func (h *Handler) Health(c *gin.Context) {
 
 	paths := h.checkPaths()
 	disk := h.checkDisk()
-	frontendServed, _ := h.checkFrontend()
 
 	resp := HealthResponse{
 		Server: ServerHealth{
@@ -78,8 +76,7 @@ func (h *Handler) Health(c *gin.Context) {
 			Running: h.steamcmd.IsRunning(),
 		},
 		Frontend: FrontendHealth{
-			Served: frontendServed,
-			Path:   h.frontendDir,
+			Served: true,
 		},
 	}
 
@@ -129,14 +126,6 @@ func (h *Handler) checkDisk() []DiskHealth {
 	return result
 }
 
-func (h *Handler) checkFrontend() (bool, string) {
-	if h.frontendDir == "" {
-		return false, ""
-	}
-	fi, err := os.Stat(h.frontendDir)
-	return err == nil && fi.IsDir(), h.frontendDir
-}
-
 func checkServerBinary(serverfileDir string) bool {
 	_, found := findServerBinary(serverfileDir)
 	return found

backend/internal/api/router.go

@@ -19,7 +19,6 @@ type Handler struct {
 	modsDir       string
 	cfgDir        string
 	profilesDir   string
-	frontendDir   string
 }
 
 func New(
@@ -30,7 +29,7 @@ func New(
 	steamcmd *services.SteamCmdManager,
 	scheduler *services.Scheduler,
 	streamer *services.LogStreamer,
-	dataDir, serverfileDir, modsDir, cfgDir, profilesDir, frontendDir string,
+	dataDir, serverfileDir, modsDir, cfgDir, profilesDir string,
 ) *Handler {
 	return &Handler{
 		settings:      settings,
@@ -45,7 +44,6 @@ func New(
 		modsDir:       modsDir,
 		cfgDir:        cfgDir,
 		profilesDir:   profilesDir,
-		frontendDir:   frontendDir,
 	}
 }
 

frontend/src/pages/Status.tsx

@@ -78,7 +78,6 @@ export default function Status() {
 
         <Section title="Frontend">
           <StatusRow label="Served" value={data.frontend.served ? 'Yes' : 'No'} ok={data.frontend.served} />
-          <StatusRow label="Path" value={data.frontend.path ? <CopyPath path={data.frontend.path} /> : '-'} />
         </Section>
       </div>
 

frontend/src/types/index.ts

@@ -77,7 +77,6 @@ export interface ServerHealth {
   }
   frontend: {
     served: boolean
-    path: string
   }
 }