feat: add some more detailed errors

server/internal/handler/handler.go

@@ -63,7 +63,7 @@ func (h *Handler) post(w http.ResponseWriter, r *http.Request, target string) {
 
 	body, err := io.ReadAll(r.Body)
 	if err != nil {
-		writeError(w, http.StatusBadRequest, err)
+		writeError(w, http.StatusBadRequest, fmt.Errorf("failed to decode body: %w", err))
 		return
 	}
 	defer r.Body.Close()
@@ -90,7 +90,7 @@ func (h *Handler) post(w http.ResponseWriter, r *http.Request, target string) {
 
 	var data map[string]any
 	if err := json.Unmarshal(body, &data); err != nil {
-		writeError(w, http.StatusInternalServerError, err)
+		writeError(w, http.StatusInternalServerError, fmt.Errorf("failed to decode body: %w", err))
 		return
 	}