Attempt to fix docs

Cribbed from https://cloudblogs.microsoft.com/opensource/2019/04/05/publishing-github-pages-from-azure-pipelines/
and https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/utility/install-ssh-key?view=azure-devops

azure-pipelines.yml

@@ -1,6 +1,5 @@
 jobs:
-
-- job: check_formatting
+  - job: check_formatting
     displayName: Check formatting
     pool:
       vmImage: ubuntu-16.04
@@ -13,7 +12,7 @@ jobs:
           $HOME/.cargo/bin/cargo fmt -- --check
         displayName: Run rustfmt
 
-- job: run_book_tests
+  - job: run_book_tests
     displayName: Book code example tests
     pool:
       vmImage: ubuntu-16.04
@@ -26,7 +25,7 @@ jobs:
           cd docs/book/tests && $HOME/.cargo/bin/cargo test
         displayName: Test book code examples via skeptic
 
-- job: build_book_master
+  - job: build_book_master
     displayName: Build rendered book on master branch and push to Github
     pool:
       vmImage: ubuntu-16.04
@@ -35,25 +34,25 @@ jobs:
     variables:
       - group: github-keys
     steps:
-    # - task: InstallSSHKey@0
-    #   inputs:
-    #     hostName: $(secret.GHSshKnownHosts)
-    #     sshPublicKey: $(secret.GHSshPub)
-    #     sshKeySecureFile: $(secret.GHSshPriv)
+      - task: InstallSSHKey@0
+        inputs:
+          hostName: $(GHSshKnownHosts)
+          sshPublicKey: $(GHSshPub)
+          sshKeySecureFile: $(GHSshPriv)
       - script: |
           ./docs/book/ci-build.sh master
 
-- template: _build/azure-pipelines-template.yml
+  - template: _build/azure-pipelines-template.yml
     parameters:
       name: Linux
       vmImage: ubuntu-16.04
 
-- template: _build/azure-pipelines-template.yml
+  - template: _build/azure-pipelines-template.yml
     parameters:
       name: macOS
       vmImage: macOS-10.13
 
-- template: _build/azure-pipelines-template.yml
+  - template: _build/azure-pipelines-template.yml
     parameters:
       name: Windows
       vmImage: vs2017-win2016

docs/book/ci-build.sh

@@ -44,6 +44,8 @@ git clean -fd
 git checkout gh-pages
 rm -rf $VERSION
 mv /tmp/book-content ./$VERSION
+git config --local user.name "Juniper Doc Bot"
+git config --local user.email "juniper@example.com"
 git add -A $VERSION
-git commit -m "Updated book for $VERSION"
+git commit -m "Updated book for $VERSION ***NO_CI***"
 git push origin gh-pages