web: added docs button in the header

web/templates/add_build.html

@@ -38,6 +38,7 @@
                 </a>
             </div>
             <div>
+                <a href="https://ardupilot.org/copter/docs/common-custom-firmware.html" class="btn btn-outline-light me-1"><i class="bi bi-book me-2"></i>Docs</a>
                 <a href="https://github.com/ArduPilot/CustomBuild/issues/new" class="btn btn-outline-light me-1"><i class="bi bi-github me-2"></i>Report an issue</a>
                 <a href="/" class="btn btn-primary"><i class="bi bi-eye me-2"></i>View all builds</a>     
             </div>

web/templates/index.html

@@ -40,6 +40,8 @@
                         </a>
                     </div>
                     <div>
+                        <a href="https://ardupilot.org/copter/docs/common-custom-firmware.html" class="btn btn-outline-light me-1"><i
+                                class="bi bi-book me-2"></i>Docs</a>
                         <a href="https://github.com/ArduPilot/CustomBuild/issues/new" class="btn btn-outline-light me-1"><i
                                 class="bi bi-github me-2"></i>Report an issue</a>
                         <a href="/add_build" class="btn btn-success"><i class="bi bi-plus-square me-2"></i>Add a build</a>