refactor: add some details on server example usage

docs/installation.md

@@ -145,11 +145,16 @@ $ make create-db
 
 Here are a few examples to query the server:
 
-* To list all instances configured and available: `http://localhost:8080/instance`
-* To list all datasets available and configured within the `default` instance: `http://localhost:8080/instance/default/dataset`
-* To print all data for the `observations` dataset with column 1, 2 and 3 configured within the `default` instance: `http://localhost:8080/search/default/observations?a=1;2;3`
-* To count number of data available for the `observations` dataset configured within the `default` instance: `http://localhost:8080/search/default/observations?a=count`
-* To print only 3 observations data (search by id) from the `observations` dataset configured within the `default` instance: `http://localhost:8080/search/default/observations?a=1;2;3&c=1::in::418|419|420`
+* To list all instances configured and available:
+    * `http://localhost:8080/instance`
+* To list all datasets available and configured within the ***default*** instance:
+    * `http://localhost:8080/instance/default/dataset`
+* To print all data for the ***observations*** dataset with column 1, 2 and 3 configured within the ***default*** instance:
+    * `http://localhost:8080/search/default/observations?a=1;2;3`
+* To count number of data available for the ***observations*** dataset configured within the ***default*** instance:
+    * `http://localhost:8080/search/default/observations?a=count`
+* To print only 3 observations data (search by id) from the ***observations*** dataset configured within the ***default*** instance:
+    * `http://localhost:8080/search/default/observations?a=1;2;3&c=1::in::418|419|420`
 
 ### Client