Add some more ideas

projects/infrastructure/container-registry-cache.md

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+# Container Registry Cache
+Although I currently already have such a cache running (kind of), revisit this to work properly.
+
+## Resources
+- [CNCF Distribution](https://distribution.github.io/distribution/)

projects/infrastructure/experiment-with-criu.md

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+# Experiment with CRIU
+Run some experiments with CRIU and maybe how this could be integrated into things like nomad
+
+## Resources
+- [CRIU](https://criu.org/Main_Page)

projects/infrastructure/try-authentik.md

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+# Try Authentik
+Try out Authentik for providing a central auth endpoint for my homelab,
+which is more secure than my current setup.
+
+## Resources
+- [Authentik](https://goauthentik.io/)