update README.md, added assignment DB

README.md

@@ -10,6 +10,12 @@ This repository contains the assignments for class
 - Assignment E - [Data Streams](E_streams).
 - Assignment F - [Graph Data](F_graph_data).
 - Assignment G - [Docker](G_docker).
+- Assignment DB -
+    [Database](https://github.com/sgra64/db-freerider) with
+    [DB1](https://github.com/sgra64/db-freerider/blob/main/markup/Ue_DB1_Server_Build.md)
+    (DB-Server Build with Docker) and
+    [DB2](https://github.com/sgra64/db-freerider/blob/main/markup/Ue_DB2_Schema_Data_Build.md)
+    (DB Build with DB-Schema and Data load, Queries).