[DRE-maint] Bug#956508: gitlab: webpack should build assets in production mode

[vv221]

I submitted a patch through salsa:
https://salsa.debian.org/ruby-team/gitlab/-/merge_requests/5

A copy of this patch it attached to this e-mail for convenience.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-Build-assets-generated-by-webpack-in-production-mode.patch
Type: text/x-patch
Size: 1163 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-ruby-extras-maintainers/attachments/20200412/7790928f/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/pkg-ruby-extras-maintainers/attachments/20200412/7790928f/attachment.sig>