Update documentation on ECR and docker-hub for opensearch to reflect admin credentials change

[DarshitChanpura]

Update docker-hub and ECR documentation to reflect changes to admin user credentials in security plugin demo configuration tool once 2.12 is GA. (Owners: @peterzhuamazon @prudhvigodithi since they have access to update)

Tasks:

• Update docker-hub documentation
• Update ECR documentation

[prudhvigodithi]

Also we should update ECR as well https://gallery.ecr.aws/opensearchproject/opensearch.
Thanks

[DarshitChanpura]

thanks @prudhvigodithi. I've updated the description.

[peterzhuamazon]

Updated already.

[DarshitChanpura]

@peterzhuamazon any reason why this got re-opened?

[rishabh6788]

Will be closed after 2.12.0 released.

[bbarani]

@rishabh6788 @peterzhuamazon @DarshitChanpura Can we close this issue?

[DarshitChanpura]

On docker-hub & ECR, some description still needs be updated;

Send requests to the OpenSearch REST API to verify that OpenSearch is working. By default, OpenSearch uses self-signed TLS certificates. The -k short option skips the certificate verification step so requests don't fail. The default username is admin and the default password is admin.

curl -X GET "https://localhost:9200" -ku admin:admin
curl -X GET "https://localhost:9200/_cat/nodes?v" -ku admin:admin
curl -X GET "https://localhost:9200/_cat/plugins?v" -ku admin:admin

[peterzhuamazon]

Changed now.

[peterzhuamazon]

This issue is completed for now.
Thanks.

[peterzhuamazon]

More updates:

The default username is `admin` and the password will be `admin` for OpenSearch 2.12 and earlier. For OpenSearch 2.12 and later, the password will be the custom value, which is required to be provided during the demo configuration setup for security plugin.