What is the best way to inject my own CSS into an OpensearchDashboards Dashboard?

OpenSearch Dashboards
1

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):

v 2.7.0

Describe the issue:

I would like to right-align numeric values in a DataTable visualization.

.euiDataGridRowCell.euiDataGridRowCell--lastColumn {
    text-align: right;
}

Is there a recommended way to apply a simple customization such as this to my instance?

Configuration:

Relevant Logs or Screenshots:

I also filed this as an issue. Data Table Visualization - Right Align Numeric fields · Issue #4791 · opensearch-project/OpenSearch-Dashboards · GitHub