Provide document generation instructions for Code of Conduct

like for the Constitution but "without the caveats" for nested bullet lists

Author: dannyadair

code-of-conduct/.gitignore

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+code-of-conduct.html
+code-of-conduct.pdf

code-of-conduct/README.md

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+# Code of Conduct
+
+This is Markdown source code to produce HTML (for https://python.nz) and PDF (for
+printing).
+
+#### Create HTML
+
+Use [pandoc](https://pandoc.org):
+
+```
+pandoc code-of-conduct.md -o code-of-conduct.html -V "pagetitle:Code of Conduct"
+```
+
+(`-s` standalone, `pagetitle` to suppress title warning without inserting another
+headline)
+
+#### Create PDF
+
+Just print the HTML from your browser to a PDF file.<br> If you want to use a dedicated
+conversion tool instead, we've successfully used [weasyprint](https://weasyprint.org/):
+
+```
+weasyprint code-of-conduct.html code-of-conduct.pdf
+```