Add testing workflow

.gitea/workflows/buildsite.yaml

@@ -0,0 +1,18 @@
+name: Site Builder
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: gentoo-amd64
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: build
+        run: mkdocs build
+      - name: Clean old deployment
+        run: rm -rf /var/www/vhosts/starforge.co.uk/site/*
+      - name: deploy
+        run: cp -a site/* /var/www/vhosts/starforge.co.uk/site/