[rtems-docs commit] README: Added centOS 8 instructions

[Joel Sherrill]

Module:    rtems-docs
Branch:    master
Commit:    205f755bfd516c1c94d2b348d5e8f2c6bfb1610c
Changeset: http://git.rtems.org/rtems-docs/commit/?id=205f755bfd516c1c94d2b348d5e8f2c6bfb1610c

Author:    Stephen Clark <stephen.clark at oarcorp.com>
Date:      Thu Jul 15 11:24:35 2021 -0500

README: Added centOS 8 instructions

Added some instructions for setting up CentOS 8.

---

 README.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.txt b/README.txt
index 13bf8e6..828c9e7 100644
--- a/README.txt
+++ b/README.txt
@@ -287,6 +287,17 @@ PATH:
   export PATH=/usr/local/texlive/2016/bin/i386-linux/:${PATH}
   export PATH=${HOME}/.local/bin:${PATH}
 
+CentOS 8
+~~~~~~~~
+
+The steps for Centos 8 are similar to the steps for CentOS 7.
+There are just a couple differences.
+
+First, CentOS 8 uses Python 3.x as the default, so intalling the
+centos-release-scl and rh-python36 packages is unnecessary.
+Second, Centos 8 uses dnf as its package manager instead of yum, so
+packages such as npm should be installed using dnf instead.
+
 Arch Linux
 ~~~~~~~~~~