i'd like to create a docker-compose file that sets up our net core backend with azurite emulator and a react frontend
Creating a Docker Compose file to set up a .NET Core backend, an Azurite emulator, and a React frontend involves defining services for each component in the `docker-compose.yml` file. Below is a basic example of how you might structure this file:

### Directory Structure

Before diving into the `docker-compose.yml`, ensure your directory structure is organized, like so:

```
/your-project
|-- /backend         # .NET Core backend
|-- /frontend        # React frontend
|-- docker-compose.yml
```

### Sample `docker-compose.yml`

Here’s a sample `docker-compose.yml` file for your setup:

```yaml
version: '3.8'

services:
  backend:
    image: your-backend-image:latest
    build:
      context: ./backend
      dockerfile: Dockerfile
    ports:
      - "5000:80" # Adjust the ports as necessary
    environment:
      - ASPNETCORE_ENVIRONMENT=Development
      - AzureWebJobsStorage=UseDevelopmentStorage=true # For Azurite
    depends_on:
      - azurite

  azurite:
    image: mcr.microsoft.com/azure-storage/azurite
    ports:
      - "10000:10000"  # Blob service
      - "10001:10001"  # Queue service
      - "10002:10002"  # Table service
    environment:
      - AZ
i'd like to create a docker-compose file that sets up our net core backend with azurite emulator and a react frontend. I'm trying to figure out how to set up the network so that the backend can access the files in the frontend.

Here's my current docker-compose.yml file:

```yaml
version: "3.9"

services:
  backend:
    image: mcr.microsoft.com/dotnet/core/sdk:5.0
    working_dir: /app
    command: dotnet watch run
    ports:
      - "5000:80"
    environment:
      ASPNETCORE_ENVIRONMENT: Development
      ASPNETCORE_URLS: http://+:80
    volumes:
      - ./src/backend:/app

  frontend:
    image: mcr.microsoft.com/dotnet/core/sdk:5.0
    working_dir: /app
    command: npm run start
    ports:
      - "3000:3000"
    environment:
      ASPNETCORE_ENVIRONMENT: Development
      ASPNETCORE_URLS: http://+:3000
    volumes:
      - ./src/frontend:/app

  azurite:
    image: mcr.microsoft.com/azure-storage