1

docker/dist-server/go.mod

@@ -0,0 +1,3 @@
+module dist-server
+
+go 1.24

docker/dist-server/main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const (
+	defaultPort = "80"
+	webRoot     = "/www"
+	indexName   = "index.html"
+)
+
+func main() {
+	port := strings.TrimSpace(os.Getenv("PORT"))
+	if port == "" {
+		port = defaultPort
+	}
+
+	server := &http.Server{
+		Addr:    ":" + port,
+		Handler: http.HandlerFunc(serve),
+	}
+
+	log.Printf("dist server listening on :%s", port)
+	if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+		log.Fatal(err)
+	}
+}
+
+func serve(w http.ResponseWriter, r *http.Request) {
+	requestPath := strings.TrimPrefix(filepath.Clean("/"+r.URL.Path), "/")
+	if requestPath == "." || requestPath == "" {
+		serveIndex(w, r)
+		return
+	}
+
+	fullPath := filepath.Join(webRoot, filepath.FromSlash(requestPath))
+	if info, err := os.Stat(fullPath); err == nil && !info.IsDir() {
+		applyAssetCacheHeaders(w, requestPath)
+		http.ServeFile(w, r, fullPath)
+		return
+	}
+
+	serveIndex(w, r)
+}
+
+func serveIndex(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-cache")
+	w.Header().Set("Pragma", "no-cache")
+	w.Header().Set("Expires", "0")
+	http.ServeFile(w, r, filepath.Join(webRoot, indexName))
+}
+
+func applyAssetCacheHeaders(w http.ResponseWriter, requestPath string) {
+	if strings.EqualFold(requestPath, indexName) {
+		w.Header().Set("Cache-Control", "no-cache")
+		w.Header().Set("Pragma", "no-cache")
+		w.Header().Set("Expires", "0")
+		return
+	}
+
+	if strings.HasPrefix(requestPath, "static/") {
+		w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+	}
+}