Add doc objectstorage

Package Owner Merge Request

Package Changes

Updated documentation for package integration with object storage.

Additional Details

Closes https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/846

docs/developer/package-integration/package-integration-storage.md

@@ -2,11 +2,11 @@
 
 If the package you are integrating connects to object storage (e.g. S3 buckets), you will need to follow the instructions below to integrate this feature into Big Bang.
 
-In BigBang MinIO is a consistent, performant and scalable object store for the cloud strategies. Minio is Kubernetes-native by design and is S3 compatible.
+In BigBang MinIO is a consistent, performant and scalable object store for the cloud strategies. Minio is Kubernetes-native by design and provides S3 compatible endpoints.
 
 ## Prerequisites
 
-Addon Minio is enabled at the BigBang level. Alternatively, you have (1) an existing Minio Instance, (2) an AWS S3 AccessKey and SecretKey, or (3) an existing S3 bucket for the deployment.
+Blob storage bucket available with correct permissions, or Minio Addon is enabled at the BigBang level. Alternatively, you have (1) an existing Minio Instance, or (2) AWS S3 AccessKey and SecretKey.
 
 ## Integration
 
@@ -21,7 +21,7 @@ Both ways will first require the following step:
 Add objectStorage values for the package in bigbang/chart/values.yaml
 
   Notes: 
-  - Names of key/values may differ based on the application being integrated. Please refer to package chart values to ensure key/values coincide and application documentation for additional information on connecting to object storage.
+  - Names of key/values may differ based on the application being integrated (eg: iamProfile for Gitlab objectStorage values). Please refer to package chart values to ensure key/values coincide and application documentation for additional information on connecting to object storage.
   - Some packages may have in-built object storage and the implementation may vary.
 
 ```yaml
@@ -100,7 +100,22 @@ minio:
 {{- end }}
 ```
 
-Example: [GitLab secret-objectstore.yaml](https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/master/chart/templates/gitlab/secret-objectstore.yaml)
+Example: [Mattermost secret-objectstore.yaml](https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/master/chart/templates/mattermost/mattermost/secret-objectstore.yaml)
 
 
 ## Validation
+For validating connection to the object storage in your environment or testing in CI pipeline you will need to add the object storage specific values to your overrides file or `./tests/test-values.yaml` respectively. If you are using Minio, ensure `addons.minio.enabled: true`.
+
+Mattermost Example:
+
+```yml
+addons:
+  mattermost:
+    enabled: true
+    objectStorage:
+      endpoint: "s3.amazonaws.com"
+      accessKey: "AHDKEJ3BYNC8B2BFJ38NRB"
+      accessSecret: "LKSJF2343KS9LS21J3KK20"
+      bucket: "myMMBucket"
+```
+In order to test that the object storage is working, perform an action that stores a file. For example, if using Mattermost, upload an image for a user avatar.
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