Add a code of conduct

Adds a CODE_OF_CONDUCT.md file to the active project and lists in .Rbuildignore, in the case of a package. The goal of a code of conduct is to foster an environment of inclusiveness, and to explicitly discourage inappropriate behaviour. The template comes from https://contributor-covenant.org, version 2: https://contributor-covenant.org/version/2/0.

use_code_of_conduct(path = NULL)

Arguments

path	Path of the directory to put CODE_OF_CONDUCT.md in, relative to the active project. Passed along to use_directory(). Default is to locate at top-level, but .github/ is also common.

Details

If your package is going to CRAN, the link to the CoC in your README must be an absolute link to a rendered website as CODE_OF_CONDUCT.md is not included in the package sent to CRAN. use_code_of_conduct() will automatically generate this link if you use pkgdown and have set the url field in pkgdown.yml; otherwise it'll link to https://contributor-covenant.org/version/2/0.