fix(#25): error the input device is not a TTY from gcloud (#26)

It happens when we try to capture the output in a variable using
the flag `-it` on the `docker run` command.
An interactive terminal cannot be created in this situaton.

Closes #25

bin/gcloud

@@ -5,7 +5,7 @@ IMAGE=eu.gcr.io/google.com/cloudsdktool/google-cloud-cli:latest
 WORKDIR=/app
 
 # run from your working directory
-docker run -it --rm \
+docker run --rm \
     --platform linux/amd64 \
     --volume $PWD:$WORKDIR \
     --volumes-from gcloud-config \