Add bucket4j

Author: joppe-s

backend/pom.xml

@@ -63,6 +63,11 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.bucket4j</groupId>
+            <artifactId>bucket4j-core</artifactId>
+            <version>8.7.0</version>
+        </dependency>
     </dependencies>
 
     <build>