Load an .env file based on environment

[MrDave1999]

Normally you have files like: .env.dev, .env.test and .env.staging, so you should load the .env file based on your environment. This environment can be defined through an environment variable such as DOTNET_ENV.

For example:

export DOTNET_ENV=staging

This feature can be achieved without modifying the library such as:

new EnvLoader()
      .AddEnvFile($".env.{Environment.GetEnvironmentVariable("DOTNET_ENV")}")
      .Load();

In a future version this feature could be added so that it is not necessary to add this line:

.AddEnvFile($".env.{Environment.GetEnvironmentVariable("DOTNET_ENV")}")

[MrDave1999]

A possible serious proposal:

new EnvLoader().LoadEnv();

LoadEnv method loads .env file based on environment defined with DOTNET_ENV. The loader will search for these .env files in the following order:

• .env.[environment].local (has the highest priority)
• .env.local
• .env.[environment]
• .env (has the lowest priority)

The environment is specified by the actual environment variable DOTNET_ENV.

It should be noted that the default environment will be "development" or "dev" if the environment is never specified with DOTNET_ENV.