Firstly, my English is not very good (I'm Vietnamese), sorry for that.
I am new to OpenShift. I hosted a Java web application (Spring MVC Restful + AngularJS) on OpenShift at https://bms-sps2.rhcloud.com/bms . When I access it, OpenShift returns a plaintext page instead of an html page. But when I develop the application on localhost, this problem does not occur.

Here is the structure of my application:

And resource mapping configuration:
<mvc:resources mapping="/" location="/app/index.html/" cache-period="86400" />
In my research, this problem is due to
MIME Type Mappings: Tomcat "Content-Type" web.xml.
mime-mapping ? mime-mapping, :
<mime-mapping>
<extension></extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>*</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension></extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>*</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
.
: web.xml
<web-app>
<display-name>Business Management System</display-name>
<servlet>
<servlet-name>bms</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>bms</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/root-context.xml
</param-value>
</context-param>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy
</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/rest/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>hibernateFilter</filter-name>
<filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter
</filter-class>
<init-param>
<param-name>sessionFactoryBeanName</param-name>
<param-value>sessionFactory</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>hibernateFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
- ?
.