Update README.md

Author: EmilePerron

README.md

@@ -1,2 +1,53 @@
-# git-version-strategy
-A custom version strategy that uses the current Git commit short-hash as the version identifier.
+# Symfony asset versioning based on Git
+This is a small Symfony bundle that implements a custom version strategy which uses the current Git commit short-hash as the version identifier.
+
+This will turn the URL of your assets from this:
+```
+/css/style.css
+```
+to 
+```
+/css/styles.css?v=b4703f8
+```
+
+This will ensure that you assets always match the current version of your project by eliminating browser caching issues.
+
+---
+
+## Getting started
+
+To get started, add the bundle to your project using Composer, like so:
+```bash
+composer require emileperron/git-version-strategy-bundle
+```
+
+Then, in your `config/bundles.php` file, include the bundle like so:
+```php
+<?php
+
+return [
+    // ...
+    Emileperron\GitVersionStrategyBundle\EmileperronGitVersionStrategyBundle::class => ['all' => true],
+];
+```
+
+Once that's done, you should be all set!
+The bundle automatically updates the configuration for `framework.assets.version_strategy` to use the `GitVersionStrategy`.
+
+---
+
+## Manual configuration of the VersionStrategy
+
+If for some reason the configuration is not set automatically, which can happen if another bundle also changes this configuration, define the following configuration in your `config/packages/framework.yaml`:
+```yaml
+
+framework:
+    assets:
+        version_strategy: 'Emileperron\GitVersionStrategyBundle\Asset\GitVersionStrategy'
+```
+
+---
+
+## Safe mode, execution operator and `shell_exec()`
+
+This bundle uses the [Execution Operator](https://www.php.net/manual/en/language.operators.execution.php) in order to get the current commit's hash. It is important to note that this **will not work** when [safe mode](https://www.php.net/manual/en/ini.sect.safe-mode.php#ini.safe-mode) is enabled or [shell_exec()](https://www.php.net/manual/en/function.shell-exec.php) is disabled.