Cannot install dradis files missed

Hello dears

I am trying to install dradis on ubuntu and this file (/server/.rvmrc) is not there under server directory please see below steps and list of files,
I noticed that the files in server directory that are in guide page (Installing Dradis from Git | Dradis Framework) is different that in my ubuntu and below is my list of files.
root#~/dradis-git# ls -l
total 20
-rwxr-xr-x 1 root root 2000 Jul 25 14:19 reset. sh
drwxr-xr-x 15 root root 4096 Jul 25 14:19 server
-rwxr-xr-x 1 root root 549 Jul 25 14:19 start. sh
-rwxr-xr-x 1 root root 6775 Jul 25 14:19 verify. sh
root#~/dradis-git# `server/

root#~/dradis-git# cd server/
root#~/dradis-git/server# ls -l
total 120
drwxr-xr-x 8 root root 4096 Jul 25 14:19 app
drwxr-xr-x 2 root root 4096 Jul 25 14:19 bin
-rw-r–r-- 1 root root 7244 Jul 25 14:19 CHANGELOG. md
drwxr-xr-x 6 root root 4096 Jul 25 14:19 config
-rw-r–r-- 1 root root 154 Jul 25 14:19 config. ru
-rw-r–r-- 1 root root 3292 Jul 25 14:19 CONTRIBUTING. md
drwxr-xr-x 3 root root 4096 Jul 25 14:19 db
-rwxr-xr-x 1 root root 135 Jul 25 14:19 dradis
drwxr-xr-x 4 root root 4096 Jul 25 14:19 engines
-rw-r–r-- 1 root root 3742 Jul 25 14:19 Gemfile
-rw-r–r-- 1 root root 9623 Jul 25 14:19 Gemfile. lock
-rw-r–r-- 1 root root 4426 Jul 25 14:19 Gemfile.plugins. template
-rw-r–r-- 1 root root 122 Jul 25 14:19 ISSUE_TEMPLATE. md
drwxr-xr-x 5 root root 4096 Jul 25 14:19 lib
drwxr-xr-x 2 root root 4096 Jul 25 14:19 packaging
-rw-r–r-- 1 root root 142 Jul 25 14:19 Procfile
drwxr-xr-x 2 root root 4096 Jul 25 14:19 public
-rw-r–r-- 1 root root 124 Jul 25 14:19 PULL_REQUEST_TEMPLATE. md
-rw-r–r-- 1 root root 321 Jul 25 14:19 Rakefile
-rw-r–r-- 1 root root 4412 Jul 25 14:19 README. md
drwxr-xr-x 2 root root 4096 Jul 25 14:19 script
drwxr-xr-x 7 root root 4096 Jul 25 14:19 spec
drwxr-xr-x 5 root root 4096 Jul 25 14:19 test
-rw-r–r-- 1 root root 818 Jul 25 14:19 Thorfile
drwxr-xr-x 5 root root 4096 Jul 25 14:19 vendor

The steps for Kali should work in Ubuntu, try this: