fix: ensure ssh-client is installed within alpine

Author: gsdevme

Dockerfile

@@ -4,7 +4,7 @@ ENV SLACK_SIGNING_SECRET=""
 ENV PORT=8080
 ENV SSH_KNOWN_HOSTS="/etc/ssh/ssh_known_hosts"
 
-RUN ssh-keyscan -H github.com >> /etc/ssh/ssh_known_hosts
+RUN apk add -no-cache openssh-client && ssh-keyscan -H github.com >> /etc/ssh/ssh_known_hosts
 
 ENTRYPOINT ["/gitops-commit"]
 COPY gitops-commit /