#62: add option for specifying image

Author: github-actions[bot]

README.md

@@ -75,6 +75,8 @@ jobs:
     - name: Start MongoDB
       uses: step-security/[email protected]
       with:
+        # Here we are using an image from Amazon's ECR rather than the default image from Docker Hub
+        mongodb-image: 'public.ecr.aws/docker/library/mongo'
         mongodb-version: ${{ matrix.mongodb-version }}
         mongodb-replica-set: test-rs
         mongodb-port: 42069