Update redis to valkey as it's the new project in fedora 41

tech/database/valkey/about.md

@@ -0,0 +1,54 @@
+---
+title: Valkey
+subsection: valkey
+section: tech-database
+description: In-memory data structure store, used as a database, cache and message broker
+---
+
+# Valkey
+
+Valkey is a free and open source in memory data structure store forked from Redis. It is widely used as a database, in memory cache or a message broker.
+
+## Quick start
+
+To install Valkey on Fedora, run the following commands:
+
+```console
+$ sudo dnf install valkey     # Install valkey cli and server
+$ sudo systemctl start valkey # Initialize valkey server
+```
+
+To start valkey on boot, run
+
+```console
+$ sudo systemctl enable valkey
+```
+
+To test valkey-cli, run
+
+```console
+$ valkey-cli ping
+PONG
+```
+
+## Configuring Valkey
+
+The config file for Valkey is located at `/etc/valkey/valkey.conf`.
+
+```console
+$ sudo nano /etc/valkey/valkey.conf
+```
+
+Valkey should be always restarted after changing settings. Restart valkey by running
+
+```console
+$ sudo systemctl restart valkey
+```
+
+Secure valkey by enabling authentication. Add this line in `/etc/valkey/valkey.conf`
+
+```console
+requirepass  <AuthPassword>
+```
+
+and after the Valkey server restarts, all clients must execute `AUTH <AuthPassword>` to be able to execute commands in Valkey.