sendmail missing from COmanage Match docker container

The Docker container for COmanage Match v1.1.0 is missing the sendmail package.

When a potential match is found, Match is unable to send email to the configured Notification Email.

relevant lines from the log:

<debug>2023-02-24 20:42:29 debug: ois/99999999 Matched 1 candidate(s) using rule partial match</debug>
<debug>2023-02-24 20:42:29 debug: Inserted new matchgrid entry at row ID 12</debug>                  
sh: 1: /usr/sbin/sendmail: not found                  
<error>2023-02-24 20:42:29 error: Could not send email: unknown</error>                  
<debug>2023-02-24 20:42:29 debug: ois/99999999 Preparing response with status code 500</debug>                        
{{10.1.1.1 - reguser [24/Feb/2023:20:42:28 +0000] "PUT /match/api/1/v1/people/ois/99999999 HTTP/1.1" 500 364 "-" "CakePHP" }}

Running apt-get install sendmail resolves the problem.