Initial AD port

themes/after-dark/docs/content/feature/code-analysis.md

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+title = "Code Analysis"
+description = "Test generated website HTML for problems."
+categories = ["experience"]
+tags = ["docker", "container", "cloud", "ci", "go", "robots"]
+features = ["code highlighter", "related content", "snippets"]
+[[copyright]]
+  owner = "Josh Habdas"
+  date = "2019"
+  license = "agpl-3.0-or-later"
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+
+After Dark includes a source build of {{< external "https://github.com/wjdp/htmltest" "htmltest" />}} which may be used to analyze HTML generated for problems such as linkrot, meta attributes and more.
+
+Code analysis is ideal for identifying potential 404 errors and determining when to link to the archived version of an external page which has gone offline.
+
+To use install Docker then run the following command:
+
+```sh
+cd after-dark/docker/htmltest && docker build --rm .
+```
+
+Build container uses Alpine and includes `musl-dev` for high-performance. Update the `HTMLTEST_VERSION` to get a specific release built. Upon successful build extract the resulting binary out of the scratch container like:
+
+```
+docker create -it --name temp f2b785583ce8 sh && \
+sudo docker cp temp:/htmltest /usr/local/bin && \
+docker rm -fv temp
+```
+
+Where `f2b785583ce8` is the scratch container’s Image ID and `/usr/local/bin` is the destination on the host. Place executable in most appropriate directory.
+
+If using Hugo `0.56.x` or higher may also possible to include `htmltest` as a Go module using {{< external "https://gohugo.io/hugo-modules/" "Hugo Modules" />}} if your particular use case calls for it.
+
+See {{< external "https://github.com/wjdp/htmltest" "htmltest" />}} for documentation and usage.