Looks like it failed though.
root@Brunnhilde:~# docker run -it tquinnelly/clamav -i
2019-06-15T16:16+0000 ClamAV scanning started
Updating ClamAV scan DB
ClamAV update process started at Sat Jun 15 16:16:00 2019
Downloading main.cvd [100%]
main.cvd updated (version: 58, sigs: 4566249, f-level: 60, builder: sigmgr)
Downloading daily.cvd [100%]
daily.cvd updated (version: 25481, sigs: 1594709, f-level: 63, builder: raynman)
Downloading bytecode.cvd [100%]
bytecode.cvd updated (version: 328, sigs: 94, f-level: 63, builder: neo)
Database updated (6161052 signatures) from database.clamav.net (IP: 104.16.219.84)
Freshclam updated the DB
Scanning /scan
/scan: No such file or directory
WARNING: /scan: Can't access file
----------- SCAN SUMMARY -----------
Known viruses: 6151733
Engine version: 0.101.2
Scanned directories: 0
Scanned files: 0
Infected files: 0
Data scanned: 0.00 MB
Data read: 0.00 MB (ratio 0.00:1)
Time: 25.827 sec (0 m 25 s)