diff --git a/.github/workflows/build-push.yml b/.github/workflows/build-push.yml
index 2bac27982..b06d2976d 100644
--- a/.github/workflows/build-push.yml
+++ b/.github/workflows/build-push.yml
@@ -1,5 +1,7 @@
 name: Build and deploy (docs)
 on:
+  repository_dispatch:
+    types: [trigger-preview-build]
   workflow_call:
     inputs:
       environment:
@@ -39,14 +41,14 @@ on:
 env:
   FRONT_DOOR_USERNAME: ${{ secrets.FRONT_DOOR_USERNAME }}
   FRONT_DOOR_PASSWORD: ${{ secrets.FRONT_DOOR_PASSWORD }}
-  GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}     
+  GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}    
 jobs:
   prod-check-branch:
     runs-on: ubuntu-24.04
     steps:
       - name: Output variables
         run: |
-          echo "Environment: ${{ inputs.environment }}"
+          echo "Environment: ${{ inputs.environment || github.event.client_payload.environment }}"
           echo "Branch: ${{ github.ref }}"
       - name: Checks to see that main branch is selected if deploying to prod
         if: ${{ inputs.environment == 'prod' && github.ref != 'refs/heads/main' }}
@@ -63,7 +65,7 @@ jobs:
       docs_source_path: "public"
       docs_build_path: "./"
       doc_type: "hugo"
-      environment: ${{inputs.environment}}
+      environment: ${{ inputs.environment || github.event.client_payload.environment }}
       force_hugo_theme_version: ${{inputs.hugo_theme_override}}
       auto_deploy_branch: "main"
       auto_deploy_env: "prod"
@@ -71,6 +73,25 @@ jobs:
       AZURE_CREDENTIALS: ${{secrets.AZURE_CREDENTIALS_DOCS}}
       AZURE_KEY_VAULT: ${{secrets.AZURE_KEY_VAULT_DOCS}}
 
+  trigger-theme-slack-notification:
+    if: github.event_name == 'repository_dispatch'
+    needs: call-docs-build-push
+    runs-on: ubuntu-latest
+    permissions: read-all
+    steps:
+      - name: Trigger 'Slack notification for new theme release' workflow in 'nginx-hugo-theme' repo.
+        run: |
+           curl -L \
+              -X POST \
+              -H "Accept: application/vnd.github+json" \
+              -H "Authorization: Bearer ${{ secrets.F5_CLA_TOKEN }}" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              "https://api.github.com/repos/${{ secrets.OWNER }}/${{ secrets.REPO }}/dispatches" \
+              -d "{"event_type": "trigger-slack-notification", "client_payload": {"previewURL": "${{ env.PREVIEW_URL }}",  "author": "${{ github.event.client_payload.author}}", "tag_name": "${{ github.event.client_payload.tag_name }}", "release_name": "${{ github.event.client_payload.release_name }}"}}"
+    env:
+      PREVIEW_URL: ${{ needs.call-docs-build-push.outputs.PREVIEW_URL }}
+
+
   lighthouseci:
     if: github.event.pull_request
     needs: call-docs-build-push
diff --git a/layouts/redoc/single.html b/layouts/redoc/single.html
deleted file mode 100644
index 25ce8b667..000000000
--- a/layouts/redoc/single.html
+++ /dev/null
@@ -1,99 +0,0 @@
-{{ define "main" }}
-
-<style>
-  .nginx-docs-api-container {
-    z-index: 0 !important;
-    max-width: calc(100% + 2.4rem);
-    margin-top: 2rem;
-  }
-
-  @media (min-width: 768px) {
-    .nginx-docs-api-container {
-      z-index: 0 !important;
-      max-width: calc(75% + 2.4rem);
-    }
-  }
-
-  html {
-    scroll-behavior: auto !important;
-  }
-
-  .menu-content {
-    top: 0 !important;
-    height: 100vh !important;
-  }
-  .bCOLCR {
-    background: #e6e6e6;
-  }
-  .fTsuzH {
-    background-color: #e6e6e6;
-  }
-  .fgRoXk {
-    background-color: #fafafa;
-  }
-  #api-component > api-container > redoc {
-    background-color: #e6e6e6;
-  }
-  div.sc-jSFjdj.sc-gKAaRy.dYGhuI.fTsuzH > div > h3 {
-    color: #000000;
-  }
-  div.sc-dvUynV.fgRoXk.redoc-wrap {
-    margin-left: -15px;
-    margin-right: -15px;
-  }
-  .gKPxXE .collapser {
-    background-color: transparent !important;
-  }
-  div
-    > div.sc-jSFjdj.sc-gKAaRy.dYGhuI.fTsuzH
-    > div.sc-EZqKI.iONckA
-    > button:hover {
-    background-color: #003963;
-  }
-  div > div.sc-giAqHp.hIuvjA > button:hover {
-    color: #003963;
-  }
-  .nginx-docs-api-container button:hover {
-    background-color: rgb(237, 237, 237);
-  }
-  pre {
-    white-space: pre-wrap;
-  }
-</style>
-<!--Use wide page layout for the API reference pages-->
-<section class="main-layout api">
-  <div class="sidebar-layout" data-mf="true" style="display:none;">
-    <nav id="sidebar-v2" class="sidebar">
-      {{ partial "sidebar-v2.html" . }}
-    </nav>
-  </div>
-  <div
-    class="row flex-md-nowrap content-layout"
-    style="
-      position: relative;
-      flex-wrap: nowrap;
-      margin-right: 9px;
-      max-width: calc(100% + 9px);
-    "
-  >
-    <nav
-      id="sidebar"
-      class="sidenav overflow-auto col-md-3 d-none d-md-block d-print-none sidebar-toggle-hidden-width"
-      style="width: 25%; border-right: 1px solid #e6e6e6"
-      ;
-    >
-      {{ partial "sidebar.html" . }}
-    </nav>
-    <section class="breadcrumb-layout" data-mf="true" style="display: none;">
-      {{ if not .IsHome }}
-        {{ if not (in .Params.display_breadcrumb "false" ) }}
-        {{ partial "breadcrumb" .}}  
-        {{ end }}
-      {{ end }}
-    </section>
-    <div class="nginx-docs-api-container">
-      <div id="api-component">{{ .Content}}</div>
-    </div>
-  </section>
-  </div>
-{{ end }}