diff --git a/README.md b/README.md
new file mode 100644
index 0000000..03a3fb2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,41 @@
+bagage
+======
+
+**This is a technical preview, use it a your own risk, expect bugs and missing features.**
+
+Bagage will be a service to access your documents everywhere.
+
+Currently, it is only a WebDAV to S3 proxy.
+Later, it may propose a web interface and support synchronization with the Nextcloud client.
+
+
+how it works
+------------
+
+bagage exposes a webdav endpoint behind an HTTP basic auth.
+Credentials provided through basic auth are used to authenticate on the LDAP server, then 2 keys `garage_s3_access_key` and `garage_s3_secret_key` are fetched from the user's LDAP profile to authenticate against the S3 server.
+
+For now, these entries must be manually/externally added to the LDAP server prior using the service.
+
+configuration
+-------------
+
+bagage is configured through environment variables.
+You can get all the keys and their default values in the [config.go](https://git.deuxfleurs.fr/Deuxfleurs/bagage/src/branch/main/config.go#L9) file.
+
+
+running it
+----------
+
+You need a S3 endpoint and a LDAP server running.
+Once you correctly set your environment variables, you can simply run it:
+
+```
+go run .
+```
+
+docker
+-------
+
+A simple dockerfile is proposed to build a binary if you want.
+