nvm looks for .nvmrc file.

.nvmrc files may also have comments. The comment delimiter is #, and it and any text after it, as well as blank lines, and leading and trailing white space, will be ignored when parsing.

• Added a change log entry in changelog.d/<directory>/.
• Added self to copyright blurb of touched files.
• Added self to AUTHORS.rst.
• Wrote tests.
• Documented my changes in docs/man/ or elsewhere.
• My changes do not contradict
  the current specification.
• I agree to license my contribution under the licenses indicated in the
  changed files.