add service readiness

Author: aptalca

root/etc/s6-overlay/s6-rc.d/svc-opencode-server/notification-fd

@@ -0,0 +1 @@
+3

root/etc/s6-overlay/s6-rc.d/svc-opencode-server/run

@@ -11,12 +11,11 @@ else
     echo "**** No connection token is set ****"
 fi
 
-cd /app/openvscode-server || exit
-
 exec \
-    s6-setuidgid abc \
-        /app/openvscode-server/bin/openvscode-server \
-            --host 0.0.0.0 \
-            --port 3000 \
-            --disable-telemetry \
-            ${CODE_ARGS}
+    s6-notifyoncheck -d -n 7 -w 1000 -c "nc -z 127.0.0.1 3000" \
+        cd /app/openvscode-server s6-setuidgid abc \
+            /app/openvscode-server/bin/openvscode-server \
+                --host 0.0.0.0 \
+                --port 3000 \
+                --disable-telemetry \
+                ${CODE_ARGS}