use regular workflow instead of composite action

.github/workflows/generate-sandboxes.yml

@@ -13,6 +13,14 @@ on:
   # 3. Comment out the whole "generate-main" job starting at line 26
   # 3. 👉 DON'T FORGET TO UNDO STEP 2 AND 3 BEFORE YOU MERGE YOUR CHANGES!
 
+env:
+  YARN_ENABLE_IMMUTABLE_INSTALLS: "false"
+  CLEANUP_SANDBOX_NODE_MODULES: "true"
+
+defaults:
+  run:
+    working-directory: ./code
+
 jobs:
   generate-next:
     name: Generate to next
@@ -21,21 +29,42 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: jeppe/25922-ci-generation-of-sandboxes-fail-sometimes-on-prereleases
-      - uses: ./.github/actions/generate-sandboxes-composite-action
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: ".nvmrc"
+
+      - name: Setup git user
+        run: |
+          git config --global user.name "storybook-bot"
+          git config --global user.email "[email protected]"
+
+      - name: Install dependencies
+        working-directory: ./scripts
+        run: node --experimental-modules ./check-dependencies.js
+
+      - name: Compile Storybook libraries
+        run: yarn task --task compile --start-from=auto --no-link
+
+      - name: Publish to local registry
+        run: yarn local-registry --publish
+
+      - name: Run local registry
+        run: yarn local-registry --open &
+
+      - name: Wait for registry
+        run: yarn wait-on tcp:127.0.0.1:6001
+
+      - name: Generate
+        run: yarn generate-sandboxes --local-registry
+
+      - name: Publish
+        run: yarn publish-sandboxes --remote=https://storybook-bot:${{ secrets.PAT_STORYBOOK_BOT }}@github.com/storybookjs/sandboxes.git --push --branch=next
+
+      - name: The job has failed
+        if: ${{ failure() || cancelled() }}
+        env:
+          DISCORD_WEBHOOK: ${{ secrets.DISCORD_MONITORING_URL }}
+        uses: Ilshidur/action-discord@master
         with:
-          destination-branch: next
-          token: ${{ secrets.PAT_STORYBOOK_BOT }}
-          discord-url: ${{ secrets.DISCORD_MONITORING_URL }}
-
-  # generate-main:
-  #   name: Generate to main
-  #   runs-on: ubuntu-latest
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #       with:
-  #         ref: main
-  #     - uses: ./.github/actions/generate-sandboxes-composite-action
-  #       with:
-  #         destination-branch: main
-  #         token: ${{ secrets.PAT_STORYBOOK_BOT }}
-  #         discord-url: ${{ secrets.DISCORD_MONITORING_URL }}
+          args: "The generation of sandboxes on the **next** branch has failed. [View Run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"