added image and icon fields to Room

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Room.java

@@ -12,6 +12,18 @@ public class Room {
     @Column(name = "id", updatable = false, nullable = false)
     private Long id;
 
+    /**
+     * Icon and image are to be given as byte[]. In order to get an encoded string from it, the
+     * Base64.getEncoder().encodeToString(byte[] content) should be used. For further information:
+     * https://www.baeldung.com/java-base64-image-string
+     * https://docs.oracle.com/javase/8/docs/api/java/util/Base64.html
+     */
+    @Column(name = "icon", updatable = true, nullable = false)
+    private byte[] icon;
+
+    @Column(name = "image", updatable = true, nullable = false)
+    private byte[] image;
+
     /** User that owns the house this room is in */
     @ManyToOne
     @JoinColumn(name = "user_id")