update readme

README.md

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 # k8s-immich
 
 A collection of kubectl yaml files to deploy immich onto kubernetes. Customisation is provided via kustomize.
+
+# Requirements
+
+- Kustomize
+- Postgres
+- Redis
+- Kubernetes Cluster (I'd recommend RKE2 from Rancher)
+
+These are not necessary but useful if you want to store your data outside the cluster.
+
+- TrueNAS
+- Democratic-csi (For auto creating NFS/ISCSI shares on TrueNAS)
+
+## Kustomize
+
+Pretty simple to install. It does come with kubectl but if you want the latest one you can use docker.
+
+`docker pull k8s.gcr.io/kustomize/kustomize:v3.8.7`
+
+Then running a command via it:
+
+`docker run k8s.gcr.io/kustomize/kustomize:v3.8.7 version`
+
+
+## Database
+
+You will need a postgres database. I have not included the postgres docker container that immich uses by default. You will probably
+want to run database for many services. I recommend [Crunchydata postgres operator](https://access.crunchydata.com/documentation/postgres-operator/v5/quickstart/).
+
+Once it is deployed then you need to [add a user](https://access.crunchydata.com/documentation/postgres-operator/5.3.0/architecture/user-management/). This will create a K8s secret for that user which you can refer to in the example-env.yaml.
+
+```yaml
+            - name: BASE_DB_URL
+              valueFrom:
+                secretKeyRef:
+                  key: uri
+                  name: example-db-pguser-immich-user
+```
+
+## Redis
+
+You will also need a redis database. For something similar to the database operator above you could use [spotahomes operator](https://github.com/spotahome/redis-operator). I just needed a single redis pod so I went for the [bitnami redis chart](https://github.com/bitnami/charts/tree/main/bitnami/redis/#installing-the-chart).
+
+
+# Install/Deployment
+
+Copy the example overlays folder so you can customise to your liking. I have provided examples of changing the most common things,
+but you can change most parts via kustomize.
+
+As of 26th Jan 2023 you will need to use the latest image tag to get [pull request](https://github.com/immich-app/immich/pull/1256).
+
+## Via kubectl
+
+Build the templates to see what they look like without applying.
+
+`kubectl kustomize overlays/custom`
+
+Deploy to the cluster.
+
+`kubectl apply -k overlays/custom`
+
+## Via docker kustomize
+
+Build the templates to see what they look like without applying.
+
+`docker run -v  absolute_path_to_checkout:/k8s k8s.gcr.io/kustomize/kustomize:v3.8.7 build /k8s/k8s-immich/overlays/custom`
+
+Deploy to the cluster.
+
+`docker run -v  absolute_path_to_checkout:/k8s k8s.gcr.io/kustomize/kustomize:v3.8.7 build /k8s/k8s-immich/overlays/custom  | kubectl apply -f -`
+
+More info: [Kustomize](https://github.com/kubernetes-sigs/kustomize)
+
+# Why not helm?
+
+Personal choice. For the past few months I have been migrating traditional applications to the K8s world and I like using kubectl directly.
+
+- More familiar with the yaml files
+- Yaml works nicely in my IDE (PyCharm)
+- Can deploy directly from my IDE
+- I find it more readable