useQuery fix

server/src/models/appointment.js

@@ -0,0 +1,25 @@
+import mongoose from 'mongoose';
+const Schema = mongoose.Schema;
+const AppointmentSchema = new Schema({
+    title: {
+        type: String,
+        required: true
+    },
+    description: {
+        type: String,
+        required: false
+    },
+    timeStart: {
+        type: Date,
+        required: true
+    },
+    timeEnd: {
+        type: Date,
+        required: true
+    },
+    deleted: {
+        type: Boolean,
+        required: false
+    }
+});
+export default mongoose.model('appointment', AppointmentSchema);