added deployment diagram description

docs/diagrams.md

@@ -9,6 +9,26 @@ The Diagrams are drawn using [draw.io](https://.wwww.draw.io). You can download
 **Deployment Diagram:**
 ![Deployment Diagram](/_static/img/deployment_diagram.png)
 
+**Relations:**
+- Mapswipe Client (App) - Realtime Database
+    - Mapswipe Client is requesting some `projects`, data of a specific `users.userId`. In case of a project selection a `groups.projectId.groupId` and `tasks.projectId.groupsId` will be requested
+    - Mapswipe Client will only write to Firebase Realtime Database in case of result generation.
+        - Mapswipe Client is writing to `results.projectId.groupId.userId1.` timestamp  and resultCount when and how many results were generated.
+        - The result itself will be written to `results.projectId.groupId.userId1.taskId1.result`.
+        - Mapswipe Client is incrementing `users.userId.contributions`, `users.userId.distance` and `groups.projectId.groupId.completedCount`
+- Mapswipe Client (Webseite) - Realtime Database
+    - Using the HTML-Import-Formular new project drafts will be written to `project_drafts.projectDraftId` in the Realtime Database
+- import / projectCreation - Realtime Database
+    - requests `projectDrafts` from Realtime Database
+    - writes to `projects.projectId`, `groups.projectId` and `tasks.projectId`
+- import / projectCreation - Postgres
+    - writes projectDraft, project, groups and tasks to Postgres
+- tansfer_results - Realtime Database
+    - requests `results` from Realtime Database
+    - deletes `results` from Realtime Database
+- tansfer_results - Postgres
+    - writes results to Postgres
+
 ---
 
 **Current Data Structure - Firebase:**