Add revision date - attempt 2 (#248)

* Revert "Revert "Add revision date to pages. (#244)" (#247)"

This reverts commit f07ca16871.

* Add missing packages

* build: get all repo history

.github/workflows/build.yml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
 
       - name: Set up Python
         uses: actions/setup-python@v1