Add missing copyright/author details header

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/resources/database-dev.properties

@@ -1,3 +1,7 @@
+# Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+
+
 # Temporary, volatile database
 spring.h2.console.enabled = true
 spring.h2.console.path    = /h2-console