template migration: generate bindata with NO metadata

This will ensure a more stable bindata.go file.

templates/server/migration.gotmpl

@@ -7,7 +7,7 @@
 	bindata "github.com/golang-migrate/migrate/v4/source/go_bindata"
 )
 
-//go:generate go-bindata -pkg migration -prefix scripts scripts
+//go:generate go-bindata -pkg migration -prefix scripts -nometadata scripts
 //go:generate sed -i "1s;^;// Code generated by go-bindata. DO NOT EDIT.\\n\\n;" bindata.go
 
 func initSource() source.Driver {