docs: include notes regarding rollback in deploy

docs, misc updates

docs/deploying.md

@@ -1,20 +1,32 @@
 # Deploying new versions
 
-We use [deploy-rs](https://github.com/serokell/deploy-rs) to deploy changes. Currently this process is not automated, so configuration changes will have to be manually deployed.
+We use [deploy-rs](https://github.com/serokell/deploy-rs) to deploy changes.
+Currently this process is not automated, so configuration changes will have to
+be manually deployed.
 
-To deploy, make sure you have a [working development shell](./development-shell.md). Then, run `deploy-rs` with the hostname of the server you want to deploy:
+To deploy, make sure you have a [working development shell](./development-shell.md).
+Then, run `deploy-rs` with the hostname of the server you want to deploy:
 
 For nachtigall.pub.solar:
 ```
-deploy '.#nachtigall'
+deploy --targets '.#nachtigall' --magic-rollback false --auto-rollback false
 ```
 
 For flora-6.pub.solar:
 ```
-deploy '.#flora-6'
+deploy --targets '.#flora-6' --magic-rollback false --auto-rollback false
 ```
 
-You'll need to have SSH Access to the boxes to be able to do this.
+Usually we skip all rollback functionality, but if you want to deploy a change
+that might lock you out, e.g. to SSH, it might make sense to set these to `true`.
 
-### SSH access
-Ensure your SSH public key is in place [here](./public-keys/admins.nix) and was deployed by someone with access.
+To skip flake checks, e.g. because you already ran them manually before
+deployment, add the flag `--skip-checks` at the end of the command.
+
+`--dry-activate` can be used to only put all files in place without switching,
+to enable switching to the new config quickly at a later moment.
+
+You'll need to have SSH Access to the boxes to be able to run `deploy`.
+
+### Getting SSH access
+See [administrative-access.md](./administrative-access.md).