Kubernetes: added multiple microservices

- added minio object storage
- added immich photo viewer
- added cloudnative-pg postgres operator for db management
- added cronjobs to run different maintenance tasks
- updated readme

kubernetes/cloud-native-pg/secrets.yaml

@@ -0,0 +1,10 @@
+---
+# Secret for MinIO credentials
+apiVersion: v1
+kind: Secret
+metadata:
+  name: minio-creds
+type: Opaque
+stringData:
+  ACCESS_KEY_ID: ${MINIO_ACCESS_KEY_ID}
+  ACCESS_SECRET_KEY: ${MINIO_ACCESS_SECRET_KEY}