update readme

README.md

@@ -1,5 +1,4 @@
-Italian Swirls 🍝
-=================
+# Italian Swirls 🍝
 
 Minimal Python language server, based on [Jedi][jedi] and [pygls][pygls].
 
@@ -21,8 +20,7 @@ Supported features:
 
 
 
-Install
--------
+## Install
 
 You can either clone and build the server package from this repository, or
 install it from PyPI:
@@ -64,10 +62,19 @@ require('lspconfig.configs').italianswirls = {
 lspconfig.italianswirls.setup { on_attach = on_attach }
 ```
 
+### Development
+
+The project uses Poetry for dependency management and packaging.
+
+```bash
+poetry install            # install deps in a virtualenv
+poetry run italianswirls  # run the LS but it may be impractical to test
+poetry build              # build to wheel
+```
 
 
-About
------
+
+## About
 
 ### Why?