added artifact upload after build

Author: dbrumley

.github/workflows/build.yml

@@ -8,7 +8,7 @@ on:
 
   # Allows running workflow manually
   workflow_dispatch:
-    
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -18,5 +18,9 @@ jobs:
         run: sudo apt-get install -y asciidoctor
       - name: Build the site using asciidoctor
         run: make
+      - uses: actions/upload-artifact@v2
+        with:
+          name: book.html
+          path: book.html