Error: smoke checks for ... failed: the app appears to be crashing

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3

I referred to this article on the same obstacle, but it did not solve the problem.

❯❯❯fly deploy --local-only                                               [main]
==> Verifying app config
Validating /Users/furukawaeiichi/PF/CREDO_QUEST/fly.toml
Platform: machines
✓ Configuration is valid
--> Verified app config
==> Building image
Error: failed to fetch an image or build from source: docker is unavailable to build the deployment image

❯❯❯fly deploy --remote-only                                              [main]
==> Verifying app config
Validating /Users/furukawaeiichi/PF/CREDO_QUEST/fly.toml
Platform: machines
✓ Configuration is valid
--> Verified app config
==> Building image
WARN Failed to start remote builder heartbeat: You hit a Fly API error with request ID: 01H396A2FGWHWSZGBHWDTN6P5Y-nrt
Error: failed to fetch an image or build from source: error connecting to docker: You hit a Fly API error with request ID: 01H396A3JFX2GRFSA3NYK7JANP-nrt