[docs] Improved development installation instructions order

Author: praptisharma28

docs/developer/installation.rst

@@ -27,37 +27,39 @@ Install spatialite and sqlite:
 Installing for Development
 --------------------------
 
-Fork and clone the forked repository:
+Create project directory:
 
 .. code-block:: shell
 
-    git clone git://github.com/<your_fork>/openwisp-firmware-upgrader
+    mkdir openwisp && cd openwisp
 
-Navigate into the cloned repository:
+The directory structure will look like this:
 
-.. code-block:: shell
+.. code-block:: text
 
-    cd openwisp-firmware-upgrader/
+    openwisp/                         # Main project folder
+    ├── env/                          # Virtual environment 
+    └── openwisp-firmware-upgrader/   # Cloned repository
 
-Launch Redis:
+Fork and clone the forked repository:
 
 .. code-block:: shell
 
-    docker-compose up -d redis
+    git clone git://github.com/<your_fork>/openwisp-firmware-upgrader
 
-Install test requirements:
+Navigate into the cloned repository:
 
 .. code-block:: shell
 
-    pip install -r requirements-test.txt
+    cd openwisp-firmware-upgrader/
 
 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
+    python -m virtualenv ../env
+    source ../env/bin/activate
 
 Make sure that your base python packages are up to date before moving to
 the next step:
@@ -66,6 +68,18 @@ the next step:
 
     pip install -U pip wheel setuptools
 
+Install test requirements:
+
+.. code-block:: shell
+
+    pip install -r requirements-test.txt
+
+Launch Redis:
+
+.. code-block:: shell
+
+    docker-compose up -d redis
+
 Install development dependencies:
 
 .. code-block:: shell