Update installation - Ubuntu. [skip ci]
Current podman deb package does not install /etc/containers/registries.conf .
The added line is for compatibility of use cases with docker.
@@ -72,6 +72,8 @@ sudo apt-get install -qq -y software-properties-common uidmap
sudo add-apt-repository -y ppa:projectatomic/ppa
sudo apt-get update -qq
sudo apt-get -qq -y install podman
+sudo mkdir -p /etc/containers
+echo -e "[registries.search]\nregistries = ['docker.io', 'quay.io']" | sudo tee /etc/containers/registries.conf
```
#### Fedora
