ci: Add docker build push docker workflow (#318)

Author: jrosco

.github/workflows/on-pull-request.yaml

@@ -34,8 +34,5 @@ jobs:
     - uses: actions/checkout@v4
     - name: Build Sphinx Image
       run: |
-        source <(curl -sL http://ci.q-ctrl.com)
-        ./ci docker build \
-          -f ./docs/Dockerfile \
-          --suffix -docs
+        docker build -f ./docs/Dockerfile
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