Improve Dockerfile to reduce intermediate images

Removing build dependencies reduces images ~80MB.

Signed-off-by: kfei <kfei@kfei.net>
Make the embedded bank page scrollable

Signed-off-by: kfei <kfei@kfei.net>
Remove two example APIs in code

1) restaurant's key deletion
2) convert all restaurant's images to list

Signed-off-by: kfei <kfei@kfei.net>
Improve the black box feature

Now even today's pick have generated, the black box function can
overwrite it.

Signed-off-by: kfei <kfei@kfei.net>
Add a basic administration panel

Signed-off-by: kfei <kfei@kfei.net>