Add .envrc sourcing .envrc.local (#3940)

Author: ss-es

.envrc

@@ -0,0 +1,10 @@
+# for security, require `direnv allow`
+# when any of these files change.
+#
+# `require_allowed` requires direnv version >= 2.38,
+# but should not cause issues on older versions of direnv
+require_allowed flake.nix
+require_allowed flake.lock
+require_allowed .envrc.local
+
+source_env .envrc.local

.gitignore

@@ -5,7 +5,7 @@ target/
 
 # .envrc typically just has `use flake .`
 # but this should be done by the user
-.envrc
+.envrc.local
 
 # These are backup files generated by rustfmt
 **/*.rs.bk

README.md

@@ -40,7 +40,7 @@ a dockerized Espresso Sequencer network with an example Layer 2 rollup applicati
 
 - Obtain code: `git clone git@github.com:EspressoSystems/espresso-network`.
 - Make sure [nix](https://nixos.org/download.html) is installed.
-- Activate the environment with `nix-shell`, or `nix develop`. If using [direnv](https://direnv.net/), copy `.envrc.example` to `.envrc` (or create your own `.envrc` file) and run `direnv allow`.
+- Activate the environment with `nix-shell`, or `nix develop`. If using [direnv](https://direnv.net/), copy `.envrc.example` to `.envrc.local` (or create your own `.envrc.local` file) and run `direnv allow`.
 - For installation without nix please see [ubuntu.md](./doc/ubuntu.md).
 
 ## Documentation