Replace with official Valkey image (#234)

* replace with official image

* use `7-alpine` tag

* prevent collision with other volumes

* Revert editing README formatting

---------

Co-authored-by: Émilien (perso) <4016501+unixfox@users.noreply.github.com>

README.md

@@ -8,7 +8,7 @@ Create a new SearXNG instance in five minutes using Docker
 | -- | -- | -- | -- |
 | [Caddy](https://github.com/caddyserver/caddy) | Reverse proxy (create a LetsEncrypt certificate automatically) | [docker.io/library/caddy:2-alpine](https://hub.docker.com/_/caddy)           | [Dockerfile](https://github.com/caddyserver/caddy-docker/blob/master/Dockerfile.tmpl) |
 | [SearXNG](https://github.com/searxng/searxng) | SearXNG by itself                                              | [docker.io/searxng/searxng:latest](https://hub.docker.com/r/searxng/searxng) | [Dockerfile](https://github.com/searxng/searxng/blob/master/Dockerfile)               |
-| [Valkey](https://github.com/valkey-io/valkey) | In-memory database                                             | [cgr.dev/chainguard/valkey:latest](https://cgr.dev/chainguard/valkey)        | [Valkey-image](https://github.com/chainguard-images/images/tree/main/images/valkey)             |
+| [Valkey](https://github.com/valkey-io/valkey) | In-memory database                                             | [docker.io/valkey/valkey:7-alpine](https://hub.docker.com/r/valkey/valkey)        | [Dockerfile](https://github.com/valkey-io/valkey-container/blob/mainline/Dockerfile.template)             |
 
 ## How to use it
 

docker-compose.yaml

@@ -25,13 +25,13 @@ services:
 
   redis:
     container_name: redis
-    image: cgr.dev/chainguard/valkey:latest
-    command: --save 30 1 --loglevel warning
+    image: docker.io/valkey/valkey:7-alpine
+    command: valkey-server --save 30 1 --loglevel warning
     restart: unless-stopped
     networks:
       - searxng
     volumes:
-      - valkey-data:/data
+      - valkey-data2:/data
     cap_drop:
       - ALL
     cap_add:
@@ -74,4 +74,4 @@ networks:
 volumes:
   caddy-data:
   caddy-config:
-  valkey-data:
+  valkey-data2: