chore: commit save point

application/source/document/html.go

application/source/document/tree.go

application/source/document/tree_test.go

application/source/environment/config.go

application/source/environment/state_html.go

development/examples/example3/build/index.html

development/examples/example3/config/web.yaml

development/examples/example3/doc/feature-1.md

development/examples/example3/doc/feature-3.md

development/examples/example3/templates/html/index.html