Update README with PIE installation instructions

Added installation instructions for the PIE repository.

Author: sharadraju

README.md

@@ -5,7 +5,10 @@ Use the PHP OCI8 extension to access Oracle Database.
 Documentation is at https://www.php.net/oci8.
 
 Installation
---------------------
+-------------
+
+**PECL**
+
 The PHP OCI8 extension is available in the PECL repository [here](https://pecl.php.net/package/oci8).
 
 Use `pecl install oci8` to install for PHP 8.2 and newer versions.
@@ -29,6 +32,17 @@ the [PECL repository](https://pecl.php.net/package/oci8). You may use the DLL di
 by including them in the `php.ini` file.
 See [OCI8 installation](https://www.php.net/manual/en/oci8.installation.php) for more details.
 
+**PIE**
+
+The PHP OCI8 extension is also available in the PIE repository [here](https://packagist.org/packages/oci8/oci8).
+
+To install from PIE, use the [pie](https://github.com/php/pie/releases) utility and run:
+```
+pie install oci8/oci8
+```
+
+**Installation Dependencies**
+
 The PHP OCI8 extension can be linked with Oracle Client libraries from Oracle
 Database 11.2 or later. These libraries are found in your database
 installation, or in the free Oracle Instant Client packages from