switch to hugomods hugo debian-node-lts image

As the current image is out-of-date, the GitLab documentation also uses
a hugomods image and as we're already using one in other repos, switch
to it.

https://docs.gitlab.com/tutorials/hugo/#add-your-gitlab-configuration-options
https://docker.hugomods.com/
https://github.com/hugomods/docker
https://hub.docker.com/r/hugomods/hugo

.forgejo/workflows/deploy.yaml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: docker
     container:
-      image: registry.gitlab.com/pages/hugo/hugo_extended:latest
+      image: hugomods/hugo:debian-node-lts-0.148.1
     steps:
       - name: Pipeline info
         run: |
@@ -21,13 +21,11 @@ jobs:
 
       - name: Install packages
         run: |
-          apk update
-          # For CI actions.
-          apk add nodejs-current
+          apt update
           # For website build.
-          apk add tzdata coreutils curl jq git
+          apt install -y curl jq git
           # For uploading.
-          apk add rsync openssh
+          apt install -y rsync ssh
 
       - uses: actions/checkout@v4
         with: