Add an image for swh-web service

Related to sysadm-environment#4812 (closed)

changed milestone to %Cassandra in production as primary storage [Roadmap - Tooling and infrastructure]

assigned to @guillaume

approved this merge request

added 3 commits

• 209311d7...d5c604f9 - 2 commits from branch master
• 826287b3 - Add an image for swh-web service

Compare with previous version

merged