Add binder link in README and on PR (#41)

* Add binder directory, binder badge on readme and binder action on PR

* Fix postBuild script

.github/workflows/binder-badge.yml

@@ -0,0 +1,14 @@
+name: Binder Badge
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  binder:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: jupyterlab/maintainer-tools/.github/actions/binder-link@v1
+        with:
+          github_token: ${{ secrets.github_token }}

README.md

@@ -1,6 +1,6 @@
 # jupyter_chat
 
-[![Github Actions Status](https://github.com/jupyterlab/jupyter-chat/workflows/Build/badge.svg)](https://github.com/jupyterlab/jupyter-chat/actions/workflows/build.yml)
+[![Github Actions Status](https://github.com/jupyterlab/jupyter-chat/workflows/Build/badge.svg)](https://github.com/jupyterlab/jupyter-chat/actions/workflows/build.yml)[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyterlab/jupyter-chat/main?urlpath=lab)
 
 This project is a monorepo containing the frontend components and extensions to build
 a chat in Jupyter.

binder/environment.yml

@@ -0,0 +1,18 @@
+name: jupyterlab-collaborative-chat
+channels:
+  - conda-forge
+dependencies:
+  - jupyterlab >=4.0.0
+  - nodejs >=18,<19
+  - python >=3.11,<3.12
+  - yarn >=3,<4
+  # build
+  - hatchling >=1.5.0
+  - hatch-jupyter-builder >=0.3.2
+  - hatch-nodejs-version
+  # Use pip to get the the latest version
+  - pip:
+    - jupyter_server >=2.0.0
+    - jupyter_collaboration
+    - jupyter_ydoc >=2.0.0,<3.0.0
+    - pycrdt

binder/postBuild

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+# Install collaborative chat
+./scripts/install.sh collaborative
+
+jupyter troubleshoot
+jupyter notebook --show-config
+jupyter lab --show-config
+jupyter labextension list
+jupyter server extension list