mocha is now a backend dev dependency

backend/package.json

@@ -44,7 +44,6 @@
     "lodash": "^4.17.21",
     "lowdb": "^1.0.0",
     "md5": "^2.2.1",
-    "mocha": "^9.2.2",
     "moment": "^2.29.4",
     "mongodb": "^3.6.9",
     "multer": "1.4.5-lts.1",
@@ -67,5 +66,8 @@
     "uuid": "^9.0.1",
     "winston": "^3.7.2",
     "xmlbuilder2": "^3.0.2"
+  },
+  "devDependencies": {
+    "mocha": "^10.2.0"
   }
 }