Server deployment

This updates the latest master to be able to be ran on the server. It moves the database configuration to the /backend/ folder, and adds support for a different config for dev and production. It also adds readme instructions for running the backend on the server.

backend/src/main/resources/spring.xml

@@ -8,9 +8,9 @@
 
 
         <bean id="dataSource" class = "org.springframework.jdbc.datasource.DriverManagerDataSource">
-                <property name="url" value="jdbc:mysql://localhost:3306/tam_database" />
-                <property name="username" value="tam_manager" />
-                <property name="password" value="tam_password" />
+                <property name="url" value="${db_url}" />
+                <property name="username" value="${db_user}" />
+                <property name="password" value="${db_pass}" />
         </bean>
         <context:annotation-config />
         <context:component-scan base-package="nl.tudelft.ewi.tam" />