[njs] Added missing steps for building with QuickJS to README.

[noreply at nginx.com]

details:   https://github.com/nginx/njs/commit/72f0b5db8595bca740ffbfd2f9213e577718a174
branches:  master
commit:    72f0b5db8595bca740ffbfd2f9213e577718a174
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Thu, 7 Nov 2024 15:26:39 -0800
description:
Added missing steps for building with QuickJS to README.


---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 855d9c0b..10ef0ba7 100644
--- a/README.md
+++ b/README.md
@@ -258,10 +258,12 @@ sudo apt install gcc make
 sudo apt install libpcre3-dev zlib1g-dev libssl-dev libxml2-dev libxslt-dev
 ```
 
-For building with [QuickJS](https://nginx.org/en/docs/njs/engine.html), you will also need to clone the QuickJS repository:
+For building with [QuickJS](https://nginx.org/en/docs/njs/engine.html), you will also need to build the QuickJS library:
 
 ```bash
 git clone https://github.com/bellard/quickjs
+cd quickjs
+CFLAGS='-fPIC' make libquickjs.a
 ```
 
 > [!WARNING]