Introduce Database page

Database.md

@@ -0,0 +1,3 @@
+# Database
+
+

Home.md

@@ -50,6 +50,7 @@
     * [[Architecture|Web application#architecture]]
     * [[Installation|Web application#installation]]
     * [[Configuration and usage|Web application#configuration-and-usage]]
+* [[Database]]
 * [[Conclusion]]
     * [[Further improvements|Conclusion#further-improvements]]
 
@@ -63,4 +64,4 @@
 * Programmer documentation
   * [Worker](http://recodex.github.io/worker/)
   * [Broker](http://recodex.github.io/broker/)
-  * [Monitor](http://recodex.github.io/monitor/)
+  * [Monitor](http://recodex.github.io/monitor/)

_Sidebar.md

@@ -13,9 +13,10 @@
 * [[Fileserver]]
 * [[Web API]]
 * [[Web application]]
+* [[Database]]
 * [[Conclusion]]
 
 ### Separated pages
 * [[FAQ]]
 * [[Logo]]
-* [[Coding style]]
+* [[Coding style]]