v0.21.5

What's Changed

• [v0.21] fix: create background proxy container (#2374) by @loft-bot in #2375
• [v0.21] fix: set resource version to 1 on old (#2385) by @loft-bot in #2386
• [v0.21] Allow docker container to reach host instead of host knowing where docker VM is. (#2395) by @loft-bot in #2400
• [v0.21] fix: storage class sync error (#2402) by @loft-bot in #2403

Full Changelog: v0.21.4...v0.21.5