Merge pull request #29 from cloud-gov/v8

Explicitly use cf v8

Dockerfile

@@ -1,4 +1,4 @@
-FROM cloudfoundry/cli:latest
+FROM cloudfoundry/cli:8
 RUN apk update && apk upgrade && apk add --no-cache bash jq curl grep coreutils
 ADD entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/bin/bash", "/entrypoint.sh"]