Replace docs.pipenv.org with pipenv.pypa.io

`dig pipenv.org ns` currently shows no nameserver for that domain;
pipenv.pypa.io is the new home for documentation, so use that
everywhere (contributors guides, `pipenv --envs` output).

.github/ISSUE_TEMPLATE.md

@@ -4,7 +4,7 @@ If you're requesting a new feature, please use the PEEP process:
 
     https://github.com/pypa/pipenv/blob/master/peeps/PEEP-000.md
 
-Check the [diagnose documentation](https://docs.pipenv.org/diagnose/) for common issues before posting! We may close your issue if it is very similar to one of them. Please be considerate, or be on your way.
+Check the [diagnose documentation](https://pipenv.pypa.io/en/latest/diagnose/) for common issues before posting! We may close your issue if it is very similar to one of them. Please be considerate, or be on your way.
 
 Make sure to mention your debugging experience if the documented solution failed.
 

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -5,7 +5,7 @@ about: Suggest an idea for this project
 
 Be sure to check the existing issues (both open and closed!), and make sure you are running the latest version of Pipenv.
 
-Check the [diagnose documentation](https://docs.pipenv.org/diagnose/) for common issues and the [PEEP list](https://github.com/pypa/pipenv/blob/master/peeps/) before posting! We may close your issue if it is very similar to one of them. Please be considerate and follow the PEEP process, or be on your way.
+Check the [diagnose documentation](https://pipenv.pypa.io/en/latest/diagnose/) for common issues and the [PEEP list](https://github.com/pypa/pipenv/blob/master/peeps/) before posting! We may close your issue if it is very similar to one of them. Please be considerate and follow the PEEP process, or be on your way.
 
 Make sure to mention your debugging experience if the documented solution failed.
 

CONTRIBUTING.md

@@ -74,7 +74,7 @@ Code Contributions
 When contributing code, you\'ll want to follow this checklist:
 
 1.  Understand our [development
-    philosophy](https://docs.pipenv.org/dev/philosophy/).
+    philosophy](https://pipenv.pypa.io/en/latest/dev/philosophy/).
 2.  Fork the repository on GitHub.
 3.  Set up your `dev-setup`{.interpreted-text role="ref"}
 4.  Run the tests (`testing`{.interpreted-text role="ref"}) to confirm

docs/dev/contributing.rst

@@ -102,7 +102,7 @@ When contributing code, you'll want to follow this checklist:
 
 The following sub-sections go into more detail on some of the points above.
 
-.. _development philosophy: https://docs.pipenv.org/dev/philosophy/
+.. _development philosophy: https://pipenv.pypa.io/en/latest/dev/philosophy/
 
 
 .. _dev-setup:

pipenv/cli/command.py

@@ -117,7 +117,7 @@ def cli(
         echo(
             "\nYou can learn more at:\n   {0}".format(
                 crayons.green(
-                    "http://docs.pipenv.org/advanced/#configuration-with-environment-variables"
+                    "https://pipenv.pypa.io/en/latest/advanced/#configuration-with-environment-variables"
                 )
             )
         )