Anti-Pattern: "Works on My Machine"
Failure pattern #4: No local dev parity. "Works on my machine" delays every sprint. If your local environment doesn't mirror production exactly, you are guessing, not engineering. Docker is non-negotiable.
The Universal Developer Excuse
Hours wasted on environment mismatches kill velocity and morale.
The Environment Chasm
Mac OS vs Linux production differences break everything. Detailed list of common breakage points.
Enforcing Parity with Docker
docker-compose.yml guarantees identical Postgres, Python, and Node versions for every developer. Full example file and onboarding checklist.
Seamless Transition to Coolify
Same compose file deploys to production PaaS with zero changes. The exact workflow that eliminates "it worked locally" forever.
Enforce Docker on day one for every new hire.
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