MongoDB connection timeout using dotnet core using docker-compose

I develop a WebAPI service in dotnet core 2.2. I use Docker desktop for windows with Linux containers I have this docker-compose file

version: '3.4'

services:
  mongo:
    image: mongo
    ports:
      - 27017:27017
  mongo-express:
    image: mongo-express
    ports:
      - 8088:8081
    depends_on:
      - mongo
  MyWebApi:
    image: MyWebApi
    build:
      context: .
      dockerfile: MyWebApi/Dockerfile
    ports:
      - 80:80
    environment:
      - ASPNETCORE_ENVIRONMENT=Development
      - ASPNETCORE_URLS=http://+:5003
    depends_on:
      - mongo

and this Dockerfile for my web api :

FROM microsoft/dotnet:2.2-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
#EXPOSE 443

FROM microsoft/dotnet:2.2-sdk AS build
WORKDIR /src
COPY ["TMSApi/TMSApi.csproj", "TMSApi/"]
COPY ["BusinessEntities/BusinessEntities.csproj", "BusinessEntities/"]
COPY ["TMSService/TMSService.csproj", "TMSService/"]
COPY ["TMSRepository/TMSRepository.csproj", "TMSRepository/"]
RUN dotnet restore "TMSApi/TMSApi.csproj"
COPY . .
WORKDIR "/src/TMSApi"
RUN dotnet build "TMSApi.csproj" -c Debug -o /app

FROM build AS publish
RUN dotnet publish "TMSApi.csproj" -c Debug -o /app

FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "TMSApi.dll", "--environment=Development"]

In my webapi appsettings.json, i use this connection string :

mongodb://mongo:27017

In the docker-compose file i have 3 services : mongo, mongo-express and MyWebApi mongo-express is connected to mongo when i use localhost:8088.

But i have a timeout when MyWebApi try to connect to mongo service.

Do you have an idea how to fix this ? i want to keep this running inside docker containers

I found some recent articles on the subject but with no result...

Thanks