By default direnv looks for and evaluates the .envrc
file that appears in a given project directory. This default behavior is good
for things like setting certain path dependencies (e.g. a specific version of
node or postgres).
To the end of using direnv to set up the development environment, it can be
useful to have it also load the .env file into the current shell's
environment.
To get direnv to do that, add this line to the .envrc file:
dotenv_if_exists .env
This specific loads all the environment variables in .env. If there are other
files, such as .env.development that need to be loaded in, those can be
included with additional
dotenv_if_exists
declarations.