Environment variable example

FunctionAppConfiguration.cs

public class FunctionAppConfiguration : IFunctionAppConfiguration
{
    public void Build(IFunctionHostBuilder builder)
    {
        builder
            .Setup((serviceCollection, commandRegistry) =>
            {
                serviceCollection
                    .AddCosmosRepository(Environment.GetEnvironmentVariable("cosmosConnectionString", EnvironmentVariableTarget.Process));
                // rest of registration
            })
            .Functions(...);
    }
}

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "AzureWebJobsDashboard": "UseDevelopmentStorage=true",
    "cosmosConnectionString": "a connection string"
  }
}