status polling in shell script

root/usr/libexec/apps/frigate/frigate.sh

@@ -178,7 +178,13 @@ case "${ACTION}" in
   "status")
     APP_NAME="frigate"
     CONTAINER_NAMES=$(docker ps -a --filter "name=${APP_NAME}" --format '{{.Names}}')
-    docker ps --all -f "name=${CONTAINER_NAMES}" --format '{{.Status}}'
+    CONTAINER_STATUS=$(docker ps --all --filter "name=${CONTAINER_NAME}" --format '{{.Status}}' | awk '/^Up/ { print "up " substr($0, 4) } !/^Up/ && /.+/ { print "down" }')
+    if [ -z "$CONTAINER_STATUS" ]; then
+        echo "${APP_NAME} is not installed"
+    else
+        echo "${CONTAINER_STATUS}"
+    fi
+    ;;
     ;;
   "port")
     APP_NAME="frigate"