[docs] Restructured Documentation

Restructured the documentation in a way that allows it to
be included in the Unified Documentation of OpenWISP.

For more information see openwisp/openwisp-docs#107.

---------

Co-authored-by: Federico Capoano <[email protected]>

docs/developer/index.rst

@@ -0,0 +1,16 @@
+Developer Docs
+==============
+
+.. include:: ../partials/developer-docs.rst
+
+.. toctree::
+    :maxdepth: 2
+
+    ./installation.rst
+    ./utils.rst
+    ./extending.rst
+
+Other useful resources:
+
+    - :doc:`../user/rest-api`
+    - :doc:`../user/settings`

docs/developer/installation.rst

@@ -0,0 +1,161 @@
+Developer Installation Instructions
+===================================
+
+.. include:: ../partials/developer-docs.rst
+
+.. contents:: **Table of contents**:
+    :depth: 2
+    :local:
+
+Dependencies
+------------
+
+- Python >= 3.8
+- InfluxDB 1.8
+- fping
+- OpenSSL
+
+Installing for Development
+--------------------------
+
+Install the system dependencies:
+
+Install system packages:
+
+.. code-block:: shell
+
+    sudo apt update
+    sudo apt install -y sqlite3 libsqlite3-dev openssl libssl-dev
+    sudo apt install -y gdal-bin libproj-dev libgeos-dev libspatialite-dev libsqlite3-mod-spatialite
+    sudo apt install -y fping
+    sudo apt install -y chromium
+
+Fork and clone the forked repository:
+
+.. code-block:: shell
+
+    git clone git://github.com/<your_fork>/openwisp-monitoring
+
+Navigate into the cloned repository:
+
+.. code-block:: shell
+
+    cd openwisp-monitoring/
+
+Start Redis and InfluxDB using Docker:
+
+.. code-block:: shell
+
+    docker-compose up -d redis influxdb
+
+Setup and activate a virtual-environment. (we'll be using `virtualenv
+<https://pypi.org/project/virtualenv/>`_)
+
+.. code-block:: shell
+
+    python -m virtualenv env
+    source env/bin/activate
+
+Make sure that you are using pip version 20.2.4 before moving to the next
+step:
+
+.. code-block:: shell
+
+    pip install -U pip wheel setuptools
+
+Install development dependencies:
+
+.. code-block:: shell
+
+    pip install -e .
+    pip install -r requirements-test.txt
+    npm install -g jshint stylelint
+
+Install WebDriver for Chromium for your browser version from
+https://chromedriver.chromium.org/home and extract ``chromedriver`` to one
+of directories from your ``$PATH`` (example: ``~/.local/bin/``).
+
+Create database:
+
+.. code-block:: shell
+
+    cd tests/
+    ./manage.py migrate
+    ./manage.py createsuperuser
+
+Run celery and celery-beat with the following commands (separate terminal
+windows are needed):
+
+.. code-block:: shell
+
+    cd tests/
+    celery -A openwisp2 worker -l info
+    celery -A openwisp2 beat -l info
+
+Launch development server:
+
+.. code-block:: shell
+
+    ./manage.py runserver 0.0.0.0:8000
+
+You can access the admin interface at ``http://127.0.0.1:8000/admin/``.
+
+Run tests with:
+
+.. code-block:: shell
+
+    ./runtests.py  # using --parallel is not supported in this module
+
+Run quality assurance tests with:
+
+.. code-block:: shell
+
+    ./run-qa-checks
+
+Alternative Sources
+-------------------
+
+PyPI
+~~~~
+
+To install the latest stable version from pypi:
+
+.. code-block:: shell
+
+    pip install openwisp-monitoring
+
+Github
+~~~~~~
+
+To install the latest development version tarball via HTTPs:
+
+.. code-block:: shell
+
+    pip install https://github.com/openwisp/openwisp-monitoring/tarball/master
+
+Alternatively you can use the git protocol:
+
+.. code-block:: shell
+
+    pip install -e git+git://github.com/openwisp/openwisp-monitoring#egg=openwisp_monitoring
+
+Install and Run on Docker
+-------------------------
+
+.. warning::
+
+    This Docker image is for development purposes only.
+
+    For the official OpenWISP Docker images, see: :doc:`/docker/index`.
+
+Build from the Dockerfile:
+
+.. code-block:: shell
+
+    docker-compose build
+
+Run the docker container:
+
+.. code-block:: shell
+
+    docker-compose up