DOC: Document how to build the docs with conda and spin

Author: Kai-Striega

doc/source/dev/building_the_docs.md

@@ -5,37 +5,26 @@ This guide goes through how to build the NumPy-Financial documentation with poet
 ## Assumptions
 
 This guide assumes that you have set up poetry and a virtual environment. If you have 
-not done this please read [building_with_poetry](building_with_poetry.md).
+not done this please read [building_with_spin](building_with_spin).
 
-You can check that poetry is installed by running:
+You can check that conda and spin are installed by running:
 
 ```shell
-poetry -V
+conda -V
 ```
 
-## Installing the documentation dependencies
-
-NumPy-Financial is built using [sphinx](https://www.sphinx-doc.org/en/master/) with [numpydoc](https://numpydoc.readthedocs.io/en/latest/).
-
-The dependencies can be installed using poetry and the ``docs`` group:
-
 ```shell
-poetry install --with docs
+spin -V
 ```
 
 ## Building the documentation
 
-The documentation is located in the ``doc``  directory. The first step is to change directory into this directory
-
-```shell
-cd doc
-```
-
-Once you are in the ``doc`` directory, the documentation can be built using ``make``.
+spin handles building the documentation for us. All we have to do is invoke the built-in command.
 
 ```shell
-poetry run make html
+spin docs -j 1
 ```
 
-This will create the docs as a html document in the ``build`` directory. Note that there are several options available,
-however, only the html documentation is built officially.
+This will create the docs as a html document in the ``doc/build`` directory. Note that there are several options 
+available, however, only the html documentation is built officially.
+  

doc/source/dev/index.rst

@@ -5,8 +5,10 @@ Development
    :maxdepth: 1
 
    getting_the_code.md
-   building_with_poetry.md
+   building_with_spin.md
    running_the_benchmarks.md
+   building_the_docs.md
+   checking_out_an_upstream_pr.md
 
 
 .. include:: ../_includes/release-notes.rst