[REF]: add keyword to readme file

JinSSJ3 · JinSSJ3 · commit dada1b7d126f · 2021-10-31T22:52:52.000-05:00
diff --git a/package.json b/package.json
@@ -31,6 +31,7 @@
     "front-end",
     "framework",
     "localization",
+    "backend",
     "kamui"
   ],
   "author": "JinSSJ3",
