Reorganize Documentation Introduction

docs/index.rst

@@ -7,11 +7,51 @@ Welcome to mapflow's documentation!
 
 ``mapflow`` transforms 3D ``xr.DataArray`` into video files in one line of code.
 
+Installation
+------------
+
+You can install ``mapflow`` using ``pip`` or ``conda``.
+
+With pip
+~~~~~~~~
+
+.. code-block:: bash
+
+   pip install mapflow
+
+With conda
+~~~~~~~~~~
+
+.. code-block:: bash
+
+   conda install -c conda-forge -y mapflow
+
+Dependencies
+~~~~~~~~~~~~
+
+``mapflow`` relies on ``matplotlib`` and ``ffmpeg``. If you're not installing ``mapflow`` from conda-forge, make sure ``ffmpeg`` is installed on your system.
+
+Usage
+-----
+
+The main function of ``mapflow`` is ``animate``, which creates a video from an ``xarray.DataArray``.
+
+.. code-block:: python
+
+   import xarray as xr
+   from mapflow import animate
+
+   ds = xr.tutorial.open_dataset("era5-2mt-2019-03-uk.grib")
+   animate(da=ds['t2m'].isel(time=slice(120)), path='animation.mp4')
+
+.. video:: ../_static/animation.mp4
+   :width: 640
+   :height: 480
+
 .. toctree::
    :maxdepth: 1
    :caption: Contents:
    :hidden:
 
-   installation
    how_to_use
    api