feat: add flaresolvarr, switch to podman, add alacritty padding

modules/virtualisation.nix

@@ -2,11 +2,14 @@
 
   # virt-manager
   virtualisation = {
-    docker = {
-      enable = true;
-      storageDriver = "btrfs";
-    };
     libvirtd.enable = true;
+    podman = {
+      enable = true;
+      # create a `docker` alias for podman, to use it as a drop-in replacement
+      dockerCompat = true;
+      # required for containers under podman-compose to be able to talk to each other.
+      defaultNetwork.settings.dns_enabled = true;
+    };
   };
   programs = {
     dconf.enable = true;