instruction: Create a comprehensive Dockerfile for storage applications with best practices
output: ```dockerfile
  from library/ubuntu
  e0a742c2abfd: Pull complete
  486cb8339a27: Pull complete
  dc6f0d824617: Pull complete
  4f7a5649a30e: Pull complete
  672363445ad2: Pull complete
  Digest: sha256:84c334414e2bfdcae99509a6add166bbb4fa4041dc3fa6af08046a66fed3005f
  Status: Downloaded newer image for ubuntu:latest
  After pulling, each of these layers is represented as a subdirectory of
  /var/lib/docker/vfs/dir/. The directory names do not correlate with the
  image layer IDs shown in the docker pull command. To see the size taken up on
  disk by each layer, you can use the du -sh command, which gives the size as a
  human-readable value.
  
  $ ls -l /var/lib/docker/vfs/dir/
  
  total 0
  drwxr-xr-x. 2 root root 19 Aug 2 18:19 3262dfbe53dac3e1ab7dcc8ad5d8c4d586a11d2ac3c4234892e34bff7f6b821e
  drwxr-xr-x. 21 root root 224 Aug 2 18:23 6af21814449345f55d88c403e66564faad965d6afa84b294ae6e740c9ded2561
  drwxr-xr-x. 21 root root 224 Aug 2 18:23 6d3be4585ba32f9f5cbff0110e8d07aea5f5b9fbb1439677c27e7dfee263171c
  drwxr-xr-x. 21 root root 224 Aug 2 18:23 9ecd2d88ca177413ab89f987e1507325285a7418fc76d0dcb4bc021447ba2bab
  drwxr-xr-x. 21 root root 224 Aug 2 18:23 a292ac6341a65bf3a5da7b7c251e19de1294bd2ec32828de621d41c7ad31f895
  drwxr-xr-x. 21 root root 224 Aug 2 18:23 e92be7a4a4e3ccbb7dd87695bca1a0ea373d4f673f455491b1342b33ed91446b
  
  $ du -sh /var/lib/docker/vfs/dir/*
  
  4.0K	/var/lib/docker/vfs/dir/3262dfbe53dac3e1ab7dcc8ad5d8c4d586a11d2ac3c4234892e34bff7f6b821e
  125M	/var/lib/docker/vfs/dir/6af21814449345f55d88c403e66564faad965d6afa84b294ae6e740c9ded2561
  104M	/var/lib/docker/vfs/dir/6d3be4585ba32f9f5cbff0110e8d07aea5f5b9fbb1439677c27e7dfee263171c
  125M	/var/lib/docker/vfs/dir/9ecd2d88ca177413ab89f987e1507325285a7418fc76d0dcb4bc021447ba2bab
  104M	/var/lib/docker/vfs/dir/a292ac6341a65bf3a5da7b7c251e19de1294bd2ec32828de621d41c7ad31f895
  104M	/var/lib/docker/vfs/dir/e92be7a4a4e3ccbb7dd87695bca1a0ea373d4f673f455491b1342b33ed91446b
  The above output shows that three layers each take 104M and two take 125M.
  These directories have only small differences
  ```