ci: read algolia keys from repo secrets

Signed-off-by: Ruby Iris Juric <[email protected]>

Author: Sorixelle

.github/workflows/build.yml

@@ -126,6 +126,10 @@ jobs:
           HTTPS_URL: https://developer.rebble.io
           JEKYLL_ENV: production
           DOCS_URL: /tmp/docs/
+          ALGOLIA_APP_ID: ${{ secrets.ALGOLIA_APP_ID }}
+          ALGOLIA_API_KEY: ${{ secrets.ALGOLIA_API_KEY }}
+          ALGOLIA_SEARCH_KEY: ${{ secrets.ALGOLIA_SEARCH_KEY }}
+          ALGOLIA_PREFIX: developer-rebble-io-prod-
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3