fix fraud posibility the client sent the unit price (#702)

* fix fraud posibility the client sent the unit price, fix unit test to use the fomat as server base

* fix bad coding convention

* update dotnet tool ef and nuget package

* Align MD with real database by default

src/Web/.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-ef": {
-      "version": "5.0.0",
+      "version": "6.0.4",
       "commands": [
         "dotnet-ef"
       ]