docs(//docsrc): Documentation generator usage documenation

Signed-off-by: Naren Dasan <naren@narendasan.com>
Signed-off-by: Naren Dasan <narens@nvidia.com>

Author: narendasan

docsrc/README.md

@@ -0,0 +1,33 @@
+# Building the Documentation
+
+We use Sphinx and Doxygen for documentation, so begin by installing the dependencies:
+
+```
+apt install doxygen
+```
+
+```
+pip3 install --user -r requirements.txt
+```
+
+Then you just need to run the Makefile to generate the docs in `../docs`
+
+There are two main relevant commands (other sphinx make commands are available)
+
+### `make html`
+
+> Make sure any time there is an API change you regenerate the master docs
+
+`make html` builds the docs for the current branch and replaces the existing master branch documentation.
+
+You can specify a version to build docs when cutting a release like this `make html VERSION=v0.0.1`
+This will place the documentation in `../docs/v0.0.1`, then you can update the `conf.py` to include
+the new version documentation in the dropdown.
+
+### `make clean`
+
+`make clean` will only delete the master documentation, not any of the version documentation
+
+To clean version documentation use `make clean VERSION=v0.0.1`
+
+