Adding nx589j markdown

Change-Id: Id17023178e7056ef867211a8d89d48fb786aa88f
diff --git a/_nubia/nubianx589j.markdown b/_nubia/nubianx589j.markdown
new file mode 100644
index 0000000..cb078b3
--- /dev/null
+++ b/_nubia/nubianx589j.markdown
@@ -0,0 +1,28 @@
+---
+layout: device
+title:  "Nubia Z17 Mini S"
+codename: nx589j
+downloadfolder: nx589j
+supportstatus: Current
+maintainer: mauronofrio
+oem: Nubia
+devicetree: https://github.com/TeamWin/android_device_nubia_nx589j
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include download.html %}
+
+{% include twrpinstall.html %}
+
+Read these instructions and follow them carefully.
+
+On your device, go into Settings -> About and find the Build Number and tap on it 7 times to enable developer settings. Press back and go into Developer Options and enable OEM unlocking.
+
+unlock bootloader and flash twrp
+
+fastboot oem nubia_unlock NUBIA_NX589J
+
+fastboot flash recovery twrp.img