Notify the docker image and the installation information in the back… (…

…#336)

* Notify the docker image and the installation information in the bnackend-diagram-converter README.

backend-diagram-converter/README.md

@@ -10,10 +10,16 @@ This project contains some modules:
 - [Core](./core): The core component of diagram migration. Here, all migration
   logic is implemented
 - [Webapp](./webapp): The webapp that can be run to have an interactive
-  migration
+  migration.
 - [CLI](./cli): The CLI implementation of the migration tool. Can be used to
   perform migration on the local machine
 
+## Installation
+
+- WebApp: access the [Installation guide](./webapp/README.md). A Docker image is available.
+- CLI: access the [README](./cli/README.md). A library is available.
+
+## Build
 Build all modules by running on the root of this repo:
 
 ```shell