ci(sourcehut): do some build artifacts trickery

.build.yml

@@ -18,7 +18,6 @@ tasks:
   # in case of triggered from hottub
   - repo-sync: |
       cd tildeweb
-      env
 
       git remote add hub https://github.com/ajhalili2006/tildeverse-web && git pull hub main
       git remote add lab https://mau.dev/ajhalili2006/tildeverse-web && git pull lab main
@@ -29,7 +28,13 @@ tasks:
   - build: |
       cd tildeweb && pip3 install -r requirements.txt --user
       export PATH="$PATH:$HOME/.local/bin"
-      mkdocs build -d public -f mkdocs.yml && mkdocs build -d public_ctrl-c -f mkdocs.ctrl-c.yml
+
+      mkdocs build -d public -f mkdocs.yml \
+        && mkdocs build -d public_ctrl-c -f mkdocs.ctrl-c.yml \
+        && mkdocs build -d public_pages.dev -f mkdocs.pages.dev.yml
+  - generate-archive: |
+      cd tildeweb
+      tar cvzf tildeweb-prod-build.tar.gz public public_ctrl-c public_pages.dev
   - deploy: |
       if [ "$BUILD_REASON" == "patchset" ] && [ "$BUILD_SUBMITTER" == "hub.sr.ht" ]; then
         complete-build
@@ -45,3 +50,5 @@ tasks:
 
       git push origin -o skip-ci
       git remote set-url lab ssh://git@mau.dev/ajhalili2006/tildeverse-web && git push lab main
+artifacts:
+  - tildeweb/tildeweb-prod-build.tar.gz