convert sqlite: add index on parent_place_id

[nominatim.git] / docs / library / Configuration.md

diff --git a/docs/library/Configuration.md b/docs/library/Configuration.md
index 19b8feb803fcb413fe9e06adb6b0f3733406e352..b97c2ccdef5720f6e7c2c6221bde31d8bdcaa277 100644 (file)
--- a/docs/library/Configuration.md
+++ b/docs/library/Configuration.md
@@ -1,4 +1,24 @@
-# Configuration class
+# Configuration
+
+When using Nominatim through the library, it can be configured in exactly
+the same way as when running as a service. This means that you should have
+created a [project directory](../admin/Import.md#creating-the-project-directory)
+which contains all files belonging to the Nominatim instance. It can also contain
+an `.env` file with configuration options. Setting configuration parameters
+via environment variables works as well.
+
+Configuration options are resolved in the following order:
+
+* from the OS environment (or the dictionary given in `environ`,
+  (see NominatimAPI.md#nominatim.api.core.NominatimAPI.__init__)
+* from the .env file in the project directory of the installation
+* from the default installation in the configuration directory
+
+For more information on configuration via dotenv and a list of possible
+configuration parameters, see the [Configuration page](../customize/Settings.md).
+
+
+## `Configuration` class
 
 ::: nominatim.config.Configuration
     options: