
This PR simply adds a reference to the guide for setting up the Slack integration. The url was obtained from [#249](https://github.com/getsentry/onpremise/issues/249#issuecomment-547117033).
This PR simply adds a reference to the guide for setting up the Slack integration. The url was obtained from [#249](https://github.com/getsentry/onpremise/issues/249#issuecomment-547117033).