Notification panel is transparent on the containerized version of COVID-Net UI

[rahmatkhah]

Describe the bug
Notification panel is transparent and text is formatted poorly on the containerized version of COVID-Net UI.

To Reproduce
Steps to reproduce the behavior:

1. Run the containerized version of COVID-Net UI (docker run --rm --name covidnet_ui -p 3000:3000 -d covidnet_ui)
2. Open notification panel

Expected behavior
Notification panel should have a grey background colour with proper padding on the header bar.

Screenshots

Current

Proposed

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Docker (please complete the following information):

• Docker version: [e.g. 20.10.10, build b485636]
• docker-compose version: [e.g. 1.29.2, build 5becea4c]

Additional context
In the Docker-built app, there is a stylesheet called _larger.scss that applies the following styles to all PatternFly-classed elements:

[class*=pf-c-], [class*=pf-c-]:after, [class*=pf-c-]:before {
    padding: 0;
    margin: 0;
    background-color: initial;
}

You can see this if you open the Chrome devtools and inspect the notification panel element. We haven’t found the reason for why these styles are being applied only in the Docker-built app.