yellow: Install Podman

Podman will provide the container runtime for Home Assistant et al.
Some additional kernel features are required to run containers.

yellow/overlay/etc/containers/policy.json

@@ -0,0 +1,32 @@
+{
+    "default": [
+        {
+            "type": "insecureAcceptAnything"
+        }
+    ],
+    "transports": {
+        "docker": {
+	    "registry.access.redhat.com": [
+		{
+		    "type": "signedBy",
+		    "keyType": "GPGKeys",
+		    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
+		}
+	    ],
+	    "registry.redhat.io": [
+		{
+		    "type": "signedBy",
+		    "keyType": "GPGKeys",
+		    "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
+		}
+	    ]
+	},
+        "docker-daemon": {
+	    "": [
+		{
+		    "type": "insecureAcceptAnything"
+		}
+	    ]
+	}
+    }
+}