Add docker image

README.md

@@ -3,4 +3,19 @@ PagesServer is a very lightweight static web server that offer two main features
 * Serve static content
 * Allow easy update of the whole website from a CI/CD system through a POST request, protected by a token & by IP filtering.
 
-This project has been written in Rust. It is based on the Actix framework.
+This project has been written in Rust. It is based on the Actix framework.
+
+## Publishing / updating website
+Make a 
+* `POST` request on `http://<website>/_mgmt/replace_files`.
+* Body:
+  * Multipart / Form-data body
+  * One field: `file` that contains a TAR archive of the website to publish
+* Headers:
+  * `Token` (mandatory) : contains the push token that allow to post files
+  * `BaseURI` (optional) : defines the directory inside the tar archive to extract to storage directory
+
+## Try it
+```bash
+docker run --rm -ti -p 8000:8000 -v $(pwd)/storage:/srv/web --env UPDATE_TOKEN=CHANGEME pierre42100/pages_server
+```