message: Improve HTTP_PROXY_AVAILABLE.
diff: @@ -44,7 +44,10 @@ if (IS_MAC_OS) {
  } else {
  define('HTTP_PROXY_PORT', 8888);
  }
  -define('HTTP_PROXY_AVAILABLE', check_tcp_port(HTTP_PROXY_HOST, HTTP_PROXY_PORT) === 1);
  +define(
  + 'HTTP_PROXY_AVAILABLE',
  + !IS_IN_DOCKER && check_tcp_port(HTTP_PROXY_HOST, HTTP_PROXY_PORT) === 1
  +);
  /** ============== Files ============== */
  define('TEST_IMAGE', __DIR__ . '/../../examples/test.jpg');
  