feat: add github known hosts

Author: gsdevme

Dockerfile

@@ -2,6 +2,9 @@ FROM alpine:3
 
 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
 
 ENTRYPOINT ["/gitops-commit"]
 COPY gitops-commit /