add link to headless-chrome installation and add ipa-gothic-fonts lin…

…k to centos 7

Signed-off-by: David Cui <davidcui@amazon.com>

README.md

@@ -49,7 +49,7 @@ There could be two reasons for this problem
 Chromium may not have all of the dependencies you may require to be able to view all of the content of your reports.
 
 If you are using a CentOS/RHEL system, install the following packages:
-* [`ipa-gothic-fonts`](https://centos.pkgs.org/8/raven-x86_64/ipa-gothic-fonts-003.03-15.el8.noarch.rpm.html)
+* [`ipa-gothic-fonts`](https://centos.pkgs.org/7/centos-x86_64/ipa-gothic-fonts-003.03-5.el7.noarch.rpm.html)
 * [`xorg-x11-fonts-100dpi`](https://centos.pkgs.org/7/centos-x86_64/xorg-x11-fonts-100dpi-7.5-9.el7.noarch.rpm.html)
 * [`xorg-x11-fonts-75dpi`](https://centos.pkgs.org/7/centos-x86_64/xorg-x11-fonts-75dpi-7.5-9.el7.noarch.rpm.html)
 * [`xorg-x11-utils`](https://centos.pkgs.org/7/centos-x86_64/xorg-x11-utils-7.5-23.el7.x86_64.rpm.html)
@@ -59,10 +59,13 @@ If you are using a CentOS/RHEL system, install the following packages:
 * [`fontconfig`](https://www.freedesktop.org/wiki/Software/fontconfig/)
 * [`freetype`](https://freetype.org/)
 
+
 If you are using a Ubuntu/Debian system, install the following packages:
 * [`fonts-liberation`](https://packages.debian.org/search?keywords=fonts-liberation)
 * [`libfontconfig1`](https://packages.debian.org/sid/libfontconfig1)
 
+The installation command for both systems can be found [here](./dashboards-reports/rendering-engine/headless-chrome/README.md).
+
 ## Code of Conduct
 
 This project has adopted the [Amazon Open Source Code of Conduct](CODE_OF_CONDUCT.md). For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq), or contact [opensource-codeofconduct@amazon.com](mailto:opensource-codeofconduct@amazon.com) with any additional questions or comments.

dashboards-reports/rendering-engine/headless-chrome/README.md

@@ -51,6 +51,6 @@ sudo apt install -y libnss3-dev fonts-liberation libfontconfig1
 ```
 - RedHat/CentOS/Amazon Linux 2 needs additional dependencies to run chromium
 ```
-sudo yum install -y libnss3.so xorg-x11-fonts-100dpi xorg-x11-fonts-75dpi xorg-x11-utils xorg-x11-fonts-cyrillic xorg-x11-fonts-Type1 xorg-x11-fonts-misc fontconfig freetype
+sudo yum install -y libnss3.so xorg-x11-fonts-100dpi xorg-x11-fonts-75dpi xorg-x11-utils xorg-x11-fonts-cyrillic xorg-x11-fonts-Type1 xorg-x11-fonts-misc fontconfig freetype ipa-gothic-fonts
 ```