Add codebase structure to README.md

README.md

@@ -60,6 +60,24 @@ Mastodon is a **free, open-source social network server** based on ActivityPub w
 
 The repository includes deployment configurations for **Docker and docker-compose** as well as specific platforms like **Heroku**, and **Scalingo**. For Helm charts, reference the [mastodon/chart repository](https://github.com/mastodon/chart). The [**standalone** installation guide](https://docs.joinmastodon.org/admin/install/) is available in the documentation.
 
+### 🏗️ Codebase structure
+
+```
+├──.devcontainer                     // Scripts and preparation files for running Mastodon in a development container such as github.dev
+├──.github                           // Health files for GitHub such as issue templates
+├──app                               // Collection of code files relating to the app's frontend
+├──bin                               // Scripts for running and hosting Mastodon
+├──config                            // Code files relating to federated hosting and Ruby bootstrappers
+├──db                                // Database files for Mastodon's information database (Host-specific backend)
+├──dist                              // Collection of code files relating app hosting on domains and port relations
+├──lib                               // Code and file library
+├──log                               // Hosting logs (Host-specific backend; reserved for Mastodon hosting)
+├──public                            // Static resource files
+├──spec                              // Helpers, presenters, and other code models
+├──streaming                         // (Host-specific backend; reserved for Mastodon hosting)
+└──vendor                            // (Host-specific backend; reserved for Mastodon hosting)
+```
+
 ## 🛠️ Building from source
 
 ### 🔤 Vagrant