Adding Sockets Extension

Author: dbpolito

template/Dockerfile.blade.php

@@ -65,6 +65,7 @@
         soap \
         xml \
         zip \
+        sockets \
 @if (version_compare($version, '8.0', '>='))
     # Temporarily building for PHP 8.0: https://github.com/Imagick/imagick/issues/358
     && git clone https://github.com/Imagick/imagick \