Docker image does not contain /app/version file

[NullIsNot0]

Description

Riot Web version 1.3.0
Docker image from https://hub.docker.com/r/vectorim/riot-web does not contain /app/version file which contains Riot Web version which is displayed in UI under Settings -> Help & About.

Steps to reproduce

run these:
docker run -dit --rm --name riot-web -p 8080:80 ![Riot](https://user-images.githubusercontent.com/12268397/61966083-727c7080-afda-11e9-9db6-b3bb76505bfd.png) vectorim/riot-web:v1.3.0
docker exec -it riot-web sh
ls -la /app

/ # ls -la /app
total 644
drwxr-xr-x   11 root     root          4096 Jul 18 15:18 .
drwxr-xr-x    1 root     root          4096 Jul 26 16:14 ..
drwxr-xr-x    3 root     root          4096 Jul 18 15:18 bundles
-rw-r--r--    1 root     root          1358 Jul 18 15:18 config.json
drwxr-xr-x    5 root     root          4096 Jul 18 15:18 fonts
drwxr-xr-x    2 root     root          4096 Jul 18 15:18 i18n
drwxr-xr-x    6 root     root         12288 Jul 18 15:18 img
-rw-r--r--    1 root     root          3788 Jul 18 15:18 index.html
-rw-r--r--    1 root     root          1616 Jul 18 15:10 manifest.json
drwxr-xr-x    2 root     root          4096 Jul 18 15:10 media
drwxr-xr-x    2 root     root          4096 Jul 18 15:18 mobile_guide
-rw-r--r--    1 root     root        170676 Jul 18 15:18 olm.219048b.wasm
-rw-r--r--    1 root     root        411549 Jul 18 15:10 olm_legacy.js
drwxr-xr-x    3 root     root          4096 Jul 18 15:10 themes
drwxr-xr-x    2 root     root          4096 Jul 18 15:18 vector-icons
drwxr-xr-x    3 root     root          4096 Jul 18 15:10 welcome
-rw-r--r--    1 root     root          5505 Jul 18 15:10 welcome.html

There's no file named version, but it should be there and contain 1.3.0

Version information

1.3.0

However /app/version file is present in downloadable zip version under releases. For example https://github.com/vector-im/riot-web/releases/download/v1.3.0/riot-v1.3.0.tar.gz

[aaronraimist]

@turt2live You said to yell if the image was broken :)

Keywords: riot web version shows as unknown. Check for update button shows a 404 error.