Fix healthcheck to exit on yagna socket issues too

check_yagna.sh

@@ -1,2 +1,14 @@
-export KEY=$(yagna app-key list --json | jq -r '.values[0][1]')
+#!/bin/sh
+set -e # Exit immediately if a command exits with a non-zero status.
+set -x # Print commands and their arguments as they are executed.
+
+# Get the Yagna app key
+KEY=$(yagna app-key list --json | jq -r '.[0].key')
+
+if [ -z "$KEY" ]; then
+    echo "Key is empty, exiting."
+    exit 1
+fi
+
+# Use the key in the curl command
 curl -H "Authorization: Bearer ${KEY}" 127.0.0.1:7465/me