add IGNORE_COVERAGE env for only show coverage

readme.md

@@ -57,6 +57,12 @@ if (false) console.log('Never runs.');
 
 Substitutes the normal `node` command; any [`node` CLI options](https://nodejs.org/api/cli.html#cli_options) can be used to run a test script. If the script doesn’t error a code coverage analysis is reported to the console, and if coverage is incomplete the exit code is `1`.
 
+If environment IGNORE_COVERAGE is set, coverage-node show result to console, but return last run code from test process:
+```sh
+IGNORE_COVERAGE=true npx coverage-node test.mjs
+echo $? # return 0, if test is successful 
+```
+
 #### Examples
 
 _Using [`npx`](https://docs.npmjs.com/cli/v7/commands/npx)._