Commit files for public release

updates.md

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+# Updates
+
+To update the infrastructure, do the following steps:
+
+```bash
+
+# Update inputs
+nix flake update
+
+# Check builds
+nix build
+
+# Push updates to git remote
+git add flake.lock
+git commit
+git push
+```
+
+Deploy updates: 
+
+```bash
+nix develop
+
+# Deploy vms
+deploy-qois .#lindberg-nextcloud .#lindberg-build
+
+# Deploy fast physical hosts
+deploy-qois .#lindberg
+
+# Deploy slow physical hosts (maybe do individually)
+deploy-qois --confirm-timeout 600 --activation-timeout 600 --targets .#fulberg .#tierberg .#stompert .#stompert
+
+```
+
+After deploying updates, verify that all services run as expected.
+For kernel updates, it might be required to reboot machines, which can be done in parallel with e.g.:
+
+```bash
+pssh -l root -H lindberg-nextcloud.backplane.net.qo.is -H lindberg-build.backplane.net.qo.is reboot
+```
+
+## Aplication Updates
+
+Some applications have pinned versions to prevent problems due to accidental upgrades.  
+The version switch has to be done manually by switching the package used.
+
+This includes the modules for:
+
+- `nextcloud`