feat: set up 'paperless-ngx' (behind nginx reverse proxy)

hosts/eetion/default.nix

@@ -64,7 +64,11 @@ in
   #
   # host: eetion
   # domain: <domain (e.g. lan)>
-  # ip address: <eetion-ip> (covers *.eetion)
+  # ip address: <eetion-ip>
+  #
+  # host: paperless
+  # domain: eetion
+  # ip address: <eetion-ip>
   services.nginx = {
     enable = true;
     recommendedGzipSettings = true;