Update about and contact pages

content/about.md

@@ -11,22 +11,17 @@ advocate for online privacy and against the surveillance capitalism
 done by big tech corporations (thus, you won't find me on
 [Facebook](https://fsf.org/fb)). 
 
-# My skills
+# My skillset
 
-Some of the programming languages I'm familiar with are:
+Some of the technologies and tech concepts I'm familiar with are:
 
-* C#
-* F#
-* Go
-* Java
-
-I'm also familiar with the following concepts and technologies:
-
-* CI/CD pipelines
-* Docker
-* Git
+* Programming languages: Bash, C#, F#, Go, Java, SQL
+* DevOps, CI/CD pipelines, Docker, virtualization software (QEMU, KVM,
+  VirtualBox, etc.)
+* Version control systems (VCS), such as Git
 * Linux systems and server environments
 
 # Want to know more?
 
-You're more than welcome to contact me. Find my contact information [here](/contact/).
+You're more than welcome to contact me. Find my contact information
+[here](/contact/).

content/contact.md

@@ -7,7 +7,28 @@ title: "Contact information"
 My email address is [sam@sapti.me](mailto:sam@sapti.me). This is my
 primary contact method.
 
+# Matrix
+
+My Matrix user is
+[@samsapti:envs.net](https://matrix.to/#/@samsapti:envs.net).
+
+![Matrix user QR code](/images/matrix.png)
+
+If you want to message me securely, please verify my below sessions:
+
+* Element Web
+  ```txt
+  Session ID: WXFXCECMXX
+  Session key: qx5r EhHy 7/sn zxPH r6kc y+4L td/i MAVj Alnv dT+5 zVM
+  ```
+* Element Android
+  ```
+  Session ID: INRTGVCLVV
+  Session key: p0TX KMti mTii eKWn VcYU SuAg 1VPB J+TO /liF 9GpS onA
+  ```
+
 # Signal
 
-I use Signal for messaging. If you have my number, feel free to message
-me there. If not, you can get it by emailing me.
+I use Signal for messaging as well. If you have my number, feel free to
+message me there. If not, you can get it by contacting me via email or
+Matrix.