feat: add production build and health tooling

chfs-ng/internal/api/health.go

@@ -0,0 +1,24 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+type healthResponse struct {
+	Status  string `json:"status"`
+	Version string `json:"version"`
+}
+
+var Version = "dev"
+
+func (s *Server) health(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet && r.Method != http.MethodHead {
+		w.Header().Set("Allow", "GET, HEAD")
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Header().Set("Cache-Control", "no-store")
+	_ = json.NewEncoder(w).Encode(healthResponse{Status: "ok", Version: Version})
+}