fix arg len checking

better var name

scripts/build-and-push-whisper-converter-image.sh

@@ -4,12 +4,12 @@ set -eufo pipefail
 command -v go >/dev/null 2>&1 || { echo 'Please install go'; exit 1; }
 command -v docker >/dev/null 2>&1 || { echo 'Please install docker'; exit 1; }
 
-if [ "$1"x == "x" ]  ; then
-  echo "Need a docker destination path, like myreg/images/"
+if [ $# -eq 0 ]  ; then
+  echo "Need a docker registry location, like myreg/images"
   echo "'mimir-whisper-converter' will be appended to this path as the image name"
   exit 1
 fi
-DOCKER_NAME="$1"
+DOCKER_REGISTRY="$1"
 
 # Build the executable
 export CGO_ENABLED=0
@@ -22,15 +22,13 @@ go build \
   "github.com/grafana/mimir-proxies/cmd/mimir-whisper-converter"
 
 # Build the docker image
-
 docker build \
   --platform linux/amd64 \
   -f cmd/mimir-whisper-converter/Dockerfile \
-  -t $DOCKER_NAME/mimir-whisper-converter:latest \
+  -t $DOCKER_REGISTRY/mimir-whisper-converter:latest \
   .
 
 # Push the docker image
-
-docker image push $DOCKER_NAME/mimir-whisper-converter:latest
+docker image push $DOCKER_REGISTRY/mimir-whisper-converter:latest
 
 echo 'Done'