webfaf: Add ad-hoc banner

[michalfabik]

Add a quick and dirty way of putting up a banner notifying all visiors of scheduled maintenance and similar issues.

While I was adding the possible discontinuation notice to fafreport, I thought I migh as well make it general purpose for similar occasions.

Signed-off-by: Michal Fabik mfabik@redhat.com

[packit-as-a-service[bot]]

Congratulations! One of the builds has completed. :champagne:

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/abrt-faf-961
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.