Document how to pull npm packages from custom registries

doc/user/compliance/license_compliance/index.md

@@ -135,7 +135,7 @@ License Compliance can be configured using environment variables.
 
 | Environment variable  | Required | Description |
 |-----------------------|----------|-------------|
-| `ADDITIONAL_CA_CERT_BUNDLE` | no | Bundle of trusted CA certificates (currently supported in Python projects). |
+| `ADDITIONAL_CA_CERT_BUNDLE` | no | Bundle of trusted CA certificates (currently supported in Pip, Pipenv, Maven, Gradle, and NPM projects). |
 | `GRADLE_CLI_OPTS` | no | Additional arguments for the gradle executable. If not supplied, defaults to `--exclude-task=test`. |
 | `LICENSE_FINDER_CLI_OPTS` | no | Additional arguments for the `license_finder` executable. For example, if your project has both Golang and Ruby code stored in different directories and you want to only scan the Ruby code, you can update your `.gitlab-ci-yml` template to specify which project directories to scan, like `LICENSE_FINDER_CLI_OPTS: '--debug --aggregate-paths=. ruby'`. |
 | `LM_JAVA_VERSION`      | no | Version of Java. If set to `11`, Maven and Gradle use Java 11 instead of Java 8. |
@@ -294,6 +294,37 @@ If you have a private Python repository you can use the `PIP_INDEX_URL` [environ
 to specify its location. It's also possible to provide a custom `pip.conf` for
 [additional configuration](#custom-root-certificates-for-python).
 
+### Configuring NPM projects
+
+You can configure NPM projects by using an [`.npmrc`](https://docs.npmjs.com/configuring-npm/npmrc.html)
+file.
+
+#### Using private NPM registries
+
+If you have a private NPM registry you can use the
+[`registry`](https://docs.npmjs.com/using-npm/config#registry)
+setting to specify its location.
+
+For example:
+
+```text
+registry = https://npm.example.com
+```
+
+#### Custom root certificates for NPM
+
+You can supply a custom root certificate to complete TLS verification by using the
+`ADDITIONAL_CA_CERT_BUNDLE` [environment variable](#available-variables).
+
+To disable TLS verification you can provide the [`strict-ssl`](https://docs.npmjs.com/using-npm/config#strict-ssl)
+setting.
+
+For example:
+
+```text
+strict-ssl = false
+```
+
 ### Migration from `license_management` to `license_scanning`
 
 In GitLab 12.8 a new name for `license_management` job was introduced. This change was made to improve clarity around the purpose of the scan, which is to scan and collect the types of licenses present in a projects dependencies.
@@ -386,8 +417,8 @@ license_scanning:
 The License Compliance job should now use local copies of the License Compliance analyzers to scan
 your code and generate security reports, without requiring internet access.
 
-Additional configuration may be needed for connecting to [private Maven repositories](#using-private-maven-repos)
-and [private Python repositories](#using-private-python-repos).
+Additional configuration may be needed for connecting to [private Maven repositories](#using-private-maven-repos),
+[private NPM registries](#using-private-npm-registries), and [private Python repositories](#using-private-python-repos).
 
 Exact name matches are required for [project policies](#project-policies-for-license-compliance)
 when running in an offline environment ([see related issue](https://gitlab.com/gitlab-org/gitlab/-/issues/212388)).