doc: add development & testing instruction in CONTRIBUTING.md (immich…

…-app#84)

* doc: add development & testing instruction in CONTRIBUTING.md

* fix: Chart.yaml no new release for doc change

CONTRIBUTING.md

@@ -25,3 +25,60 @@ Chart releases must be immutable. Any change to a chart warrants a chart version
 ### Versioning
 
 The chart `version` should follow [semver](https://semver.org/).
+
+### Development & Testing
+
+1. Install `minikube` and `helm`.
+2. Start a `minikube` cluster via
+
+   ```bash
+   minikube start
+   ```
+
+3. Create `PersistentVolumeClaim` by executing following command in shell
+
+    ```bash
+    minikube kubectl -- create -f - <<EOF
+    kind: PersistentVolumeClaim
+    apiVersion: v1
+    metadata:
+      name: pvc-immich
+    spec:
+      accessModes:
+        - ReadWriteOnce
+      resources:
+        requests:
+          storage: 1Gi
+    EOF
+    ```
+
+4. From the `charts/immich` directory execute the following command.
+   This will install the dependencies listed in `Chart.yml` and deploy the current state of the helm chart found locally.
+   If you want to test a branch, make sure to switch to the respective branch first.
+
+   ```bash
+   helm install --dependency-update immich . -f values.yaml --set immich.persistence.library.existingClaim=pvc-immich --set redis.enabled=true --set postgresql.enabled=true
+   ```
+
+5. Immich is now deployed in `minikube`.
+   To access it, it's port needs to be forwarded first from `minikube` to localhost first via
+
+   ```bash
+   minikube kubectl -- port-forward svc/immich-server 3001:3001
+   ```
+
+   Now Immich is accessible at [http://localhost:3001](http://localhost:3001) and volume contents at `/tmp/hostpath-provisioner/default`.
+
+6. Clean resources after testing (can skip `delete pvc` and `minikube delete` if testing again, but it's good to test with fresh installation)
+
+   ```bash
+   helm uninstall immich
+   minikube kubectl -- delete pvc pvc-immich data-immich-postgresql-0 redis-data-immich-redis-master-0
+   minikube stop
+   ```
+
+7. Delete `minikube` cluster (will delete all cached images and volumes) via
+
+   ```bash
+   minikube delete
+   ```