Plan independent BFF and adapt selected Sendico foundations (#34)

backend/internal/httpapi/router.go

@@ -0,0 +1,28 @@
+package httpapi
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// New is the operational shell. Product routes will be added only with their
+// persistence, authentication and provider adapters, never simulated success.
+func New() http.Handler {
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, r *http.Request) {
+		write(w, http.StatusOK, "ok")
+	})
+	mux.HandleFunc("GET /readyz", func(w http.ResponseWriter, r *http.Request) {
+		write(w, http.StatusServiceUnavailable, "not_configured")
+	})
+	return mux
+}
+
+func write(w http.ResponseWriter, status int, value string) {
+	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Cache-Control", "no-store")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(struct {
+		Status string `json:"status"`
+	}{value})
+}