Discovery Provider 0.2.0

Discovery provider changes since 0.1.2

Changes affecting Service Providers

No changes directly affection service providers.

Under the hood changes

• IPFS peering improvements while indexing (a5e9462, d869cb8, cdc96bb)
• New worker threads and processes (83587ef)
• Two way peering with other IPFS nodes (ceeed7f)
• New track_id sort param in /tracksroute (1fb297d)
• More optimized /health_check and new /block_check and /disk_check (0595d3b, 8a61336, 80505aa)

New environment variables for discovery provider
user_metadata_service_url - hardcoded