Merge pull request magento#5122 from magento/db_arch_img

Updated architectural diagram to newest version

Author: dobooth

common/images/archi_diagram_desired-state.png

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+---
+group: architecture-guide
+title: Architectural diagrams
+menu_title: Architectural diagrams
+---
+
+## Magento architecture from different perspectives  {#m2arch-whatis-overview}
+
+Depending upon your role and purpose for learning more about Magento, there are several different ways to view the Magento architecture. For example, a developer who wants to create new modules or perhaps customize an existing [module](https://glossary.magento.com/module) will want to understand the architecture of a module itself, and how it fits into the larger view, with the Magento framework and other components. However, a merchant who wants to quickly build an online storefront wants to view the collection of components from a higher level, and understand the components that impact the look, feel, and user interaction components.
+
+## Architecture layers diagram {#archi-layers}
+
+The following diagram illustrates the components and shows the "layers" or tiers in Magento.
+
+![]({{site.baseurl}}/common/images/archi_diagram_desired-state.png)
+
+## Related topics
+
+- [Architecture layers overview]({{page.baseurl}}/architecture/archi_perspectives/ALayers_intro.html)
+- [Service Isolation](https://github.com/magento/architecture/blob/master/design-documents/service-isolation.md)