Update the installation directions (#90)

* Update Getting_Started.rst

* Update doc/source/Resources/Getting_Started.rst

* Update doc/source/Resources/Getting_Started.rst

* Update Getting_Started.rst

* Apply suggestions from code review

* Apply suggestions from code review

---------

Co-authored-by: Roberto Pastor Muela <[email protected]>

Author: akaszynski

doc/source/Resources/Getting_Started.rst

@@ -4,11 +4,47 @@ Getting started
 Installation
 ~~~~~~~~~~~~
 
-This package is not yet available on PyPI, so for now the only real
-option is for you to download the code from GitHub:
+This package is not yet available on the public PyPI, but you can still install
+it using ``pip`` from our private PyPI repository.
+
+The following on Windows:
+
+.. code::
+
+   set PYANSYS_PYPI_PRIVATE_PAT=<REDACTED>
+   set INDEX_URL=https://%PYANSYS_PYPI_PRIVATE_PAT%@pkgs.dev.azure.com/pyansys/_packaging/pyansys/pypi/simple/
+   python -m pip install ansys-dyna-core --index-url %INDEX_URL%
+
+And if you are running Linux:
+
+.. code::
+
+   PYANSYS_PYPI_PRIVATE_PAT=<REDACTED>
+   export INDEX_URL='https://[email protected]/pyansys/_packaging/pyansys/pypi/simple/'
+   python -m pip install ansys-dyna-core --index-url $INDEX_URL
+
+Email your friendly PyAnsys team member for the ``PYANSYS_PYPI_PRIVATE_PAT``
+at `[email protected] <mailto:[email protected]>`_ or send us a message via Teams.
+
+**Installing from git**
+
+If you have ``git`` installed and want the bleeding edge version:
+
+.. code::
+
+   pip install -U git+https://github.com/pyansys/pyDyna@main
+
+You need to be logged into GitHub locally and be a member of the `PyAnsys Organization <https://github.com/pyansys>`_.
+
+Alternatively, if you need to modify the repository locally (or want to
+do local development), you can clone it and install it in "development" mode with:
 
 .. code::
 
    git clone https://github.com/pyansys/pyDyna
+   cd pyDyna
+   pip install -e .
 
-and copy the required files.
+Note the ``-e`` flag, which denotes that you are in development mode.
+You can make changes in the local ``pyDyna`` and have them reflected
+in your local install of PyDyna.