Update docs mentioning graalvm

DEVSIX-8795

Author: vitali-pr

BUILDING.md

@@ -18,7 +18,20 @@ $ mvn clean install \
     > >(tee mvn.log) 2> >(tee mvn-error.log >&2)
 ```
 
-You can use the supplied `Vagrantfile` to get a [Vagrant][4] VM ([Ubuntu][5] 14.04 LTS - Trusty Tahr, with [VirtualBox][6]) with all the required software installed.
+Starting from version 6.1.0 **pdfHtml** supports native image compilation using [GraalVM][4]. Follow the instructions at
+[Getting started](https://www.graalvm.org/latest/getting-started/) to build your first native application out of java sources.
+
+To run tests in native mode [GraalVM][4] for JDK 22 or higher must be installed and native profile must be used as follows
+```bash
+$ mvn clean install -Pnative -DskipTests=false \
+    -Dmaven.test.failure.ignore=false \
+    -DgsExec=$(which gs) \
+    -DcompareExec=$(which compare) \
+    -Dmaven.javadoc.failOnError=false \
+    > >(tee mvn.log) 2> >(tee mvn-error.log >&2)
+```
+
+You can use the supplied `Vagrantfile` to get a [Vagrant][5] VM ([Ubuntu][6] 14.04 LTS - Trusty Tahr, with [VirtualBox][7]) with all the required software installed.
 ```bash
 $ vagrant box add ubuntu/trusty64
 $ vagrant up
@@ -30,6 +43,7 @@ $ vagrant ssh -- \
 [1]: http://maven.apache.org/
 [2]: http://www.ghostscript.com/
 [3]: http://www.imagemagick.org/
-[4]: https://www.vagrantup.com/
-[5]: http://www.ubuntu.com/
-[6]: https://www.virtualbox.org/
+[4]: https://www.graalvm.org/
+[5]: https://www.vagrantup.com/
+[6]: http://www.ubuntu.com/
+[7]: https://www.virtualbox.org/

README.md

@@ -6,6 +6,7 @@ The **pdfHtml Community** source code is hosted on [Github][github], where you c
 
 You can also [build pdfHtml Community from source][building].
 
+Starting from version 6.1.0 **pdfHtml** supports native image compilation using GraalVM. See [building] for details.
 
 If you have an idea on how to improve **pdfHtml** and you want to submit code,
 please read our [Contribution Guidelines][contributing].
@@ -35,4 +36,4 @@ Contact [sales] for more info.
 [latest]: https://github.com/itext/i7j-pdfhtml/releases/latest
 [sales]: http://itextpdf.com/sales
 [gratis]: https://en.wikipedia.org/wiki/Gratis_versus_libre
-[pdfHtml]: https://itextpdf.com/products/convert-html-css-to-pdf-pdfhtml
+[pdfHtml]: https://itextpdf.com/products/convert-html-css-to-pdf-pdfhtml