create-empty-db: add copy of metadata to database

Signed-off-by: Alexander Graf <alex@antistatix.de>
diff --git a/create-empty-db.sh b/create-empty-db.sh
index 2ccfa52..ee7a899 100755
--- a/create-empty-db.sh
+++ b/create-empty-db.sh
@@ -3,5 +3,6 @@
 mkdir -p database
 echo '*' > database/.gitignore
 cp devices.json database/
+cp -r metadata/* database/
 python3 tools/get_tilegrid_all.py
 python3 tools/create_empty_bitdbs.py