Update README with social links

README.md

@@ -6,7 +6,9 @@ A modern Python package manager with PEP 582 support. [中文版本说明](READM
 
 ![PDM logo](https://github.com/pdm-project/pdm/blob/master/docs/docs/assets/logo_big.png)
 
-[📖 Documentation](https://pdm.fming.dev)
+[![Docs](https://img.shields.io/badge/Docs-mkdocs-blue?style=for-the-badge)](https://pdm.fming.dev)
+[![Twitter Follow](https://img.shields.io/twitter/follow/pdm_project?label=get%20updates&logo=twitter&style=for-the-badge)](https://twitter.com/pdm_project)
+[![Discord](https://img.shields.io/discord/824472774965329931?label=discord&logo=discord&style=for-the-badge)](https://discord.gg/CEUwAmYm)
 
 ![Github Actions](https://github.com/pdm-project/pdm/workflows/Tests/badge.svg)
 ![PyPI](https://img.shields.io/pypi/v/pdm?logo=python&logoColor=%23cccccc)

README_zh.md

@@ -6,7 +6,9 @@
 
 ![PDM logo](https://github.com/pdm-project/pdm/blob/master/docs/docs/assets/logo_big.png)
 
-[📖 Documentation](https://pdm.fming.dev)
+[![Docs](https://img.shields.io/badge/Docs-mkdocs-blue?style=for-the-badge)](https://pdm.fming.dev)
+[![Twitter Follow](https://img.shields.io/twitter/follow/pdm_project?label=get%20updates&logo=twitter&style=for-the-badge)](https://twitter.com/pdm_project)
+[![Discord](https://img.shields.io/discord/824472774965329931?label=discord&logo=discord&style=for-the-badge)](https://discord.gg/CEUwAmYm)
 
 ![Github Actions](https://github.com/pdm-project/pdm/workflows/Tests/badge.svg)
 ![PyPI](https://img.shields.io/pypi/v/pdm?logo=python&logoColor=%23cccccc)

docs/mkdocs.yml

@@ -12,6 +12,7 @@ theme:
     code: Fira Code
   logo: assets/logo.png
   favicon: assets/logo.png
+  custom_dir: overrides
 
 nav:
   - Home: index.md
@@ -41,3 +42,12 @@ markdown_extensions:
       base_path: docs
 
 copyright: Copyright &copy; 2019-2021 <a href="https://frostming.com">Frost Ming</a>
+
+extra:
+  social:
+    - icon: fontawesome/brands/github
+      link: https://github.com/pdm-project/pdm
+    - icon: fontawesome/brands/twitter
+      link: https://twitter.com/pdm_project
+    - icon: fontawesome/brands/discord
+      link: https://discord.gg/CEUwAmYm

docs/overrides/main.html

+{% extends 'base.html' %}
+
+{% block announce %}
+  <a href="https://twitter.com/pdm_project" style="color: currentColor">
+    For updates follow <strong>@PDM</strong> on
+    <span class="twemoji twitter">
+      {% include ".icons/fontawesome/brands/twitter.svg" %}
+    </span>
+    <strong>Twitter</strong>
+  </a>
+{% endblock %}