added automatic building+deploy of docs

.gitea/workflows/build_and_deploy_docs.yaml

@@ -0,0 +1,34 @@
+name: Build and deploy Roxygen2|pkgdown documentation site
+run-name: Documentation Build on push to main branch
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-deploy-documentation:
+    runs-on: linux_amd64
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install package dependencies
+        run: |
+          Rscript -e 'remotes::install_deps(dependencies = TRUE)'
+
+      - name: Call to roxygen2::roxygenise()
+        run: |
+          Rscript -e 'roxygen2::roxygenise()'
+
+      - name: Call to pkgdown::build_site()
+        run: |
+          Rscript -e 'pkgdown::build_site()'
+
+      - name: Deploy to WEBROOT
+        env:
+          WEBROOT: ${{ vars.WEBROOT }}
+        run: |
+          test -n "$WEBROOT"
+          mkdir -p "$WEBROOT"
+          rsync -av --delete docs/* "$WEBROOT"
+