Fix all errcheck linter issues

Co-authored-by: Junie <junie@jetbrains.com>

internal/acme/server.go

@@ -95,7 +95,7 @@ func (h *Handler) writeACMEError(w http.ResponseWriter, status int, typ, detail
 	h.addNonceHeader(w)
 	w.Header().Set("Content-Type", "application/problem+json")
 	w.WriteHeader(status)
-	json.NewEncoder(w).Encode(map[string]string{
+	_ = json.NewEncoder(w).Encode(map[string]string{
 		"type":   typ,
 		"detail": detail,
 	})
@@ -106,7 +106,7 @@ func (h *Handler) writeJSON(w http.ResponseWriter, status int, v interface{}) {
 	h.addNonceHeader(w)
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
-	json.NewEncoder(w).Encode(v)
+	_ = json.NewEncoder(w).Encode(v)
 }
 
 // loadConfig loads the ACME config for this mount from the barrier.