📝 chore: Improve docs of env vars

Author: SilviaAmAm

docs/developers/environment-variables.rst

@@ -13,9 +13,61 @@ Backend (Django)
    * - Variable
      - Description
      - Default
-   * - ``FOO``
-     - Bar
-     - ``"bla"``
+   * - ``ENVIRONMENT``
+     - A label for the environment
+     - ``"test-maykin"``
+   * - ``ALLOWED_HOSTS``
+     -  See `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#allowed-hosts>`__ 
+     - ``localhost``
+   * - ``DJANGO_SETTINGS_MODULE``
+     -  Path to the Django settings module to use.
+     - ``openbeheer.conf.docker``
+   * - ``SECRET_KEY``
+     - See `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#secret-key>`__. Can be generated with tools like https://djecrety.ir/.
+     - ``someSecretKey``
+   * - ``DB_NAME``
+     - Name of the database.
+     - ``openbeheer``
+   * - ``DB_USER``
+     - Name of the database user.
+     - ``openbeheer``
+   * - ``DB_HOST``
+     - Database hostname.
+     - ``localhost``
+   * - ``DB_PORT``
+     - Database port.
+     - ``5432``
+   * - ``CACHE_DEFAULT``
+     -  Address of the cache to use for the default cache.
+     - ``redis:6379/0``
+   * - ``CACHE_AXES``
+     -  Address of the cache to use for the axes cache.
+     - ``redis:6379/0``
+   * - ``CSRF_TRUSTED_ORIGINS``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#csrf-trusted-origins>`__.
+     - ``http://localhost:9000``
+   * - ``CSRF_COOKIE_SAMESITE``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#csrf-cookie-samesite>`__.
+     - ``Strict``
+   * - ``CSRF_COOKIE_SECURE``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#csrf-cookie-secure>`__.
+     - ``True``
+   * - ``SESSION_COOKIE_SAMESITE``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#session-cookie-samesite>`__.
+     - ``Strict``
+   * - ``SESSION_COOKIE_SECURE``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#session-cookie-secure>`__.
+     - ``True``
+   * - ``SESSION_COOKIE_AGE``
+     - See the `Django docs <https://docs.djangoproject.com/en/5.2/ref/settings/#session-cookie-age>`__.
+     - ``900``
+   * - ``OIDC_RENEW_ID_TOKEN_EXPIRY_SECONDS``
+     - Should be the same as ``SESSION_COOKIE_AGE``.
+     - ``900``
+   * - ``OPEN_ZAAK_ADMIN_BASE_URL``
+     - The url of the Open Zaak that will be used to reference back to Open Zaak when features are not available in Open Beheer.
+     - ``https://openzaak.example.nl``
+
 
 Frontend (React)
 ----------------