update doc deployment trigger to run when chnages to the docs are mad…

…e or changes to the GitHub Actions workflow. We also run the job that builds the docs on PR to test that the documentation will successfully build (#1592)

.github/workflows/deploy_docs.yaml

@@ -1,10 +1,22 @@
-name: "e-Manifest Documentation"
+name: "e-Manifest Services Docs"
 
-# This workflow builds and deploys the USEPA e-Manifest documentation
+# This workflow builds and deploys the USEPA e-Manifest web service documentation
 # It will only deploy to GitHub if the repo is 'USEPA/e-manifest'
 
 on:
   workflow_dispatch:
+  push:
+    branches: 
+      - 'master'
+    paths:
+      - '.github/workflows/*'
+      - 'docs/*'
+  pull_request:
+    branches: 
+      - 'master'
+    paths:
+      - '.github/workflows/*'
+      - 'docs/*'
 
 permissions:
   contents: read
@@ -17,7 +29,7 @@ concurrency:
 
 env:
   BOOK_DIRECTORY: ./docs
-  MDBOOK_VERSION: v0.4.25
+  MDBOOK_VERSION: v0.4.35
 
 jobs:
   build_docs:
@@ -43,7 +55,9 @@ jobs:
           path: "${{ env.BOOK_DIRECTORY }}/book"
 
   deploy_pages:
-    # if: github.repository == 'USEPA/e-manifest'
+    if: |
+      github.repository == 'USEPA/e-manifest'  &&
+      (github.event_name == 'push' && github.head_ref == 'master')
     needs: build_docs
     environment:
       name: github-pages