update readme to include precommit install (#1242)

* update readme to include precommit install

* add mac install instructions

* add gitleaks to default install

* remove unneeded params

* edit readme

* include compliance blurb

* whitespace

---------

Co-authored-by: Sean Fern <[email protected]>

Author: gfreeman-navapbc

README.md

@@ -11,6 +11,7 @@
 
 1. [Create volume directory](#create-volume-directory)
 1. [Running Locally with Intelij](#running-locally-with-intelij)
+1. [Installing and Using Pre-Commit](#installing-and-using-pre-commit)
 
 ## Create volume directory
 
@@ -50,3 +51,27 @@ API Setup
 
 
 [AB2D Deploy](Deploy/README.md)
+
+## Installing and Using Pre-commit
+
+Anyone committing to this repo must use the pre-commit hook to lower the likelihood that secrets will be exposed.
+
+### Step 1: Install pre-commit
+
+You can install pre-commit using the MacOS package manager Homebrew:
+
+```sh
+brew install pre-commit
+```
+
+Other installation options can be found in the [pre-commit documentation](https://pre-commit.com/#install).
+
+### Step 2: Install the hooks
+
+Run the following command to install the gitleaks hook:
+
+```sh
+pre-commit install
+```
+
+This will download and install the pre-commit hooks specified in `.pre-commit-config.yaml`.