Declare project URLs in Python package metadata (#778)

* Declare project URLs in Python package metadata

* Add link to GHA discussions

Co-authored-by: Sviatoslav Sydorenko <webknjaz@redhat.com>

Co-authored-by: Abhinav Singh <126065+abhinavsingh@users.noreply.github.com>

setup.cfg

@@ -2,6 +2,17 @@
 name = proxy.py
 version = attr: proxy.common.version.__version__
 url = https://github.com/abhinavsingh/proxy.py
+project_urls =
+  Container Image: DockerHub = https://hub.docker.com/r/abhinavsingh/proxy.py
+  Chat: Gitter = https://gitter.im/proxy.py/community
+  Coverage: Codecov = https://codecov.io/github/abhinavsingh/proxy.py
+  CI: GitHub = https://github.com/abhinavsingh/proxy.py/actions
+  Docs: Changelog = https://proxypy.rtfd.io/en/latest/#changelog
+  Docs: RTD = https://proxypy.rtfd.io/en/latest/
+  Docs: Intro = https://abhinavsingh.com/proxy-py-a-lightweight-single-file-http-proxy-server-in-python/
+  GitHub: discussions = https://github.com/abhinavsingh/proxy.py/discussions
+  GitHub: issues = https://github.com/abhinavsingh/proxy.py/issues
+  GitHub: repo = https://github.com/abhinavsingh/proxy.py
 download_url = https://github.com/abhinavsingh/proxy.py/archive/master.zip
 description = ⚡⚡⚡Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on Network monitoring, controls & Application development, testing, debugging.
 long_description = file: README.md