Changes From 8.0.20 To 8.0.21

Link to container image of cloudserver.

• bugfix: ZENKO-1365 Orbit set https for RING+S3
• Merge remote-tracking branch 'origin/bugfix/S3C-1843-fix-npm-dependency-vuln' into w/8.0/bugfix/S3C-1843-fix-npm-dependency-vuln
• bugfix: S3C-1843 update ver. for npm-run-all
• improvement: ignore .tox dir
• improvement: update python dependencies for docs
• Merge remote-tracking branch 'origin/feature/S3C-1807-MD-admin-routes' into w/8.0/feature/S3C-1807-MD-admin-routes
• feature: S3C-1807 proxy route for metadata
• Merge remote-tracking branch 'origin/bugfix/ZENKO-1311-ci-fixes' into w/8.0/bugfix/ZENKO-1311-ci-fixes
• improvement: push to docker hub
• bf: unit coverage
• bf: trailing spaces
• ci: exit correctly on failure
• Merge branches 'w/8.0/bugfix/S3C-1752-legacy-mpu' and 'q/1618/7.4/bugfix/S3C-1752-legacy-mpu' into tmp/octopus/q/8.0
• Merge branch 'bugfix/S3C-1752-legacy-mpu' into q/7.4
• Merge remote-tracking branch 'origin/bugfix/S3C-1752-legacy-mpu' into w/8.0/bugfix/S3C-1752-legacy-mpu
• bf: S3C-1752 add legacy support to mpu apis
• Merge branch 'improvement/simplify-ci-unit-test' into tmp/octopus/w/8.0/improvement/simplify-ci-unit-test
• improvement: use simpler unit test script