Merge pull request #9234 from ipfs/release-v0.15.0

.circleci/main.yml

.github/ISSUE_TEMPLATE/bug-report.yml

.github/ISSUE_TEMPLATE/config.yml

.github/ISSUE_TEMPLATE/doc.yml

.github/workflows/sync-release-assets.yml

CHANGELOG.md

Dockerfile

README.md

assets/dir-index-html/dir-index.html

assets/dir-index-html/src/dir-index.html

cmd/ipfs/daemon.go

config/swarm.go

core/builder.go

core/commands/add.go

core/commands/dag/dag.go

core/commands/root.go

core/commands/swarm.go

core/corehttp/gateway.go

core/corehttp/gateway_handler.go

core/corehttp/gateway_handler_unixfs.go