Icon: Duplicate environment for deployments

Purpose

Duplicate the environment icon as deployments so that we can proceed in #192 (closed) with adding a new environment icon.

Checklist

For a new icon and/or illustration:

• [-] If this adds an icon ensure that it follows the new icon checklists.
• [-] If this adds an illustration ensure that it follows the new illustration checklists.

Closes #201 (closed)