message: add better error msg for fetch failure
diff: @@ -55,7 +55,7 @@ async function getNumberOfPreviousActiveBuilds() {
  { headers: { Accept: "application/json" } }
  )
  if (res.status >= 400) {
  - throw new Error("Failed to fetch circle build data")
  + throw new Error("Failed to fetch circle build data. Make sure CIRCLE_TOKEN is a project token with `scope: all`. See https://circleci.com/docs/2.0/managing-api-tokens/#creating-a-project-api-token")
  }
  const data = await res.json()
  const activeBuilds = data
  