feat: add environment variables for Giscus configuration in Firebase hosting workflow

Author: danieldanielecki

.github/workflows/firebase-hosting-merge.yml

@@ -19,6 +19,14 @@ jobs:
         run: yarn install --frozen-lockfile
       - name: Build
         run: yarn build
+        env:
+          EXPORT: 1
+          UNOPTIMIZED: 1
+          BASE_PATH: /blog
+          NEXT_PUBLIC_GISCUS_REPO: ${{ vars.NEXT_PUBLIC_GISCUS_REPO }}
+          NEXT_PUBLIC_GISCUS_REPOSITORY_ID: ${{ vars.NEXT_PUBLIC_GISCUS_REPOSITORY_ID }}
+          NEXT_PUBLIC_GISCUS_CATEGORY: ${{ vars.NEXT_PUBLIC_GISCUS_CATEGORY }}
+          NEXT_PUBLIC_GISCUS_CATEGORY_ID: ${{ vars.NEXT_PUBLIC_GISCUS_CATEGORY_ID }}
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with:
           repoToken: ${{ secrets.GITHUB_TOKEN }}