DOC: Installation and test procedure.

Author: benel

README.md

@@ -1,7 +1,35 @@
 # GeoXEne – Geocoding through transmission or emulation
 
-1. Start the service:
 
-        docker run -d -p 3000:3000 benel/geoxene
+## How to test the development version
+
+### Requirements
+
+- node and npm
+- A [Google API key](https://console.cloud.google.com/) authorized for "Geocoding API".
+
+### Installation
+
+    npm install
+
+### Start
+
+    npm start
+
+### Test
+
+#### Geocode an address known by Google Maps
+
+  Open http://localhost:3000/json?address=Kerameikos&key={KEY}
+
+  The result is transmitted from https://maps.googleapis.com/maps/api/geocode/json?address=Kerameikos&key={KEY}
+
+
+#### Geocode a custom address (unknown to Google Maps)
+
+  Open http://localhost:3000/json?address=Tombe%202,%20N%C3%A9cropole%20au%20Nord%20de%20l%27Eridanos,%20Kerameikos&key={KEY}
+
+  The result is different from the approximate result of https://maps.googleapis.com/maps/api/geocode/json?address=Tombe%202,%20N%C3%A9cropole%20au%20Nord%20de%20l%27Eridanos,%20Kerameikos&key={KEY}
+
+  Please note that all the custom addresses can be seen on a map at <http://localhost:3000/>.
 
-2. Open <http://localhost:3000/>