add warning to notify-push if binary was not found

Signed-off-by: Simon L <szaimen@e.mail.de>

Containers/notify-push/start.sh

@@ -27,6 +27,19 @@ elif [ "$CPU_ARCH" != "x86_64" ]; then
     export CPU_ARCH="aarch64"
 fi
 
+# Add warning
+if ! [ -f "/nextcloud/custom_apps/notify_push/bin/"$CPU_ARCH"/notify_push" ]; then
+    echo "The notify_push binary was not found."
+    echo "Most likely is DNS resolution not working correctly."
+    echo "You can try to fix this by configuring a DNS server globally in dockers daemon.json."
+    echo "See https://dockerlabs.collabnix.com/intermediate/networking/Configuring_DNS.html"
+    echo "Afterwards a restart of docker should automatically resolve this."
+    echo "If it should still not work afterwards, feel free to create a new thread at https://github.com/nextcloud/all-in-one/discussions/new?category=questions and post the Nextcloud container logs there."
+    echo ""
+    echo ""
+    exit 1
+fi
+
 # Set sensitive values as env
 export DATABASE_URL="postgres://$POSTGRES_USER:$POSTGRES_PASSWORD@$POSTGRES_HOST/$POSTGRES_DB"
 export REDIS_URL="redis://:$REDIS_HOST_PASSWORD@$REDIS_HOST"