Build: Add missing variable

.env.example.githubpages

@@ -1,11 +1,12 @@
 # Those variables stay empty
 # because we don't use Keystatic on Github Pages.
-KEYSTATIC_GITHUB_CLIENT_ID=     # empty
-KEYSTATIC_GITHUB_CLIENT_SECRET= # empty
-KEYSTATIC_SECRET=               # empty
-KEYSTATIC_STORAGE_KIND=local
+KEYSTATIC_GITHUB_CLIENT_ID=     # Empty on Github Pages
+KEYSTATIC_GITHUB_CLIENT_SECRET= # Empty on Github Pages
+KEYSTATIC_SECRET=               # Empty on Github Pages
 
 # Those variables belong into .github/workflows/deploy.yml
+# They are envored by `astro.config.mjs` `env.schema``
+# KEYSTATIC_STORAGE_KIND: "local"
 # ASTRO_ENV: "production"
 # ASTRO_OUTPUT_MODE: "static"
 # ASTRO_USE_NETLIFY_ADAPTER: "false"

.github/workflows/deploy.yml

@@ -23,6 +23,7 @@ jobs:
       - name: Install, build, and upload your site output
         uses: withastro/action@v2
         env:
+          KEYSTATIC_STORAGE_KIND: "local"
           ASTRO_ENV: "production"
           ASTRO_OUTPUT_MODE: "static"
           ASTRO_USE_NETLIFY_ADAPTER: "false"