Description
With the release of 2.5.0 the VCL file in metarepository has been deprecated: https://github.com/ezsystems/ezplatform/blob/master/doc/varnish/vcl/varnish4_xkey.vcl#L4
We should rework the Docker stack so that the file from ezplatform-http-cache (https://github.com/ezsystems/ezplatform-http-cache/tree/master/docs/varnish/vcl) is used.