component_guide: Document python-gitlab config at import-debian-package

import-debian-package script now runs all the steps automatatically.
This required python-gitlab credentials to be configured in order to
access Apertis Gitlab server. Document this.

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>

content/guides/component_guide.md

@@ -67,6 +67,22 @@ This is the process to import a new package from Debian to Apertis:
 * Check out the [apertis-infrastructure repository](https://gitlab.apertis.org/infrastructure/apertis-infrastructure.git/)
 or use the SDK image, which comes with the required tools installed.
 
+* Python gitlab credentials are required to run the scripts. Set these up to
+have access to the Apertis Gitlab server, see
+[python-gitlab docs](https://python-gitlab.readthedocs.io/en/stable/cli-usage.html#configuration-file-format).
+
+  For example, write to the default user configuration file `~/.python-gitlab.cfg`:
+
+      [global]
+      default = apertis
+      ssl_verify = true
+      timeout = 5
+
+      [apertis]
+      url = https://gitlab.apertis.org/
+      private_token = $your_gitlab_private_token
+      api_version = 4
+
 * Invoke `import-debian-package` to import the new debian package:
 
       $ import-debian-package --upstream buster --downstream apertis/v2021 --component target --package hello --push-remote