shell aliases: add nixos aliases

yes, I am officially trying nixos

.config/shell/aliases

@@ -117,6 +117,12 @@ alias                                                     \
    dc='docker-compose'                                    \
    occ='docker exec -u www-data nextcloud php occ --ansi' \
 
+# Nix
+alias                                             \
+   nx='sudo $EDITOR /etc/nixos/configuration.nix' \
+   nx-upd='sudo nix-channel --update'             \
+   nx-upg='sudo nixos-rebuild switch'             \
+
 # file copying with a progress bar
 alias cpv="rsync -ah --info=progress2"