Create build-docs.yml

.github/workflows/build-docs.yml

@@ -0,0 +1,19 @@
+name: Build Documentation
+
+on:
+  workflow_call:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout your repository using git
+        uses: actions/checkout@v4
+        with:
+          repository: Xtr126/XtMapper-docs
+
+      - name: Install, build, and upload your site
+        uses: withastro/action@v2
+        with:
+            node-version: 20
+            package-manager: pnpm@latest