platankaapi: env_file: - .env
DBCONNECTINGSTRING=mongodb://host.docker.internal:27017/
string dbString = Environment.GetEnvironmentVariable("DBCONNECTINGSTRING");
"environmentVariables": { "ASPNETCORE_ENVIRONMENT": "Development", "Platanka__env": "mongodb://host.docker.internal:27017/" },
var messageFromEnv = builder.Configuration["Platanka:env"];
dotnet user-secrets set "Platanka:connStr" "1234"
Connection id "0HMU1RT1URH9C", Request id "0HMU1RT1URH9C:00000003": An unhandled exception was thrown by the application. System.ArgumentNullException: Value cannot be null. (Parameter 'connectionString')
dotnet user-secrets list