feat: ER diagram

backend/diagrams/movie_database.puml

+@startuml spotify
+
+entity Movie {
+  * id <<UUID>>
+  * id_director <<UUID>>
+  ---
+  * name: String
+  * originalName: String
+  * intro: String
+  * picture: String
+  * published: Date
+  * runTimeMinutes: Number
+}
+
+entity Category {
+  * id <<UUID>>
+  ---
+  * name: String
+}
+
+entity MovieCategory {
+  * id <<UUID>>
+  * id_movie <<UUID>>
+  * id_category <<UUID>>
+  ---
+}
+
+entity Director {
+  * id <<UUID>>
+  ---
+  * name: String
+  * surname: String
+  * birthDate: Date
+}
+
+Movie }|...|| Director
+Movie ||...|{ MovieCategory
+Category ||...o{ MovieCategory
+
+@enduml
+
+Relations: ||, |o, o|, }|, |{, o{, o}
+Preview: ALT + d