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Code review fixes: error handling, env vars, health check#565

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JiayangLai wants to merge 1 commit intoyeasy:masterfrom
JiayangLai:code-review-fix-2026-04-19
Open

Code review fixes: error handling, env vars, health check#565
JiayangLai wants to merge 1 commit intoyeasy:masterfrom
JiayangLai:code-review-fix-2026-04-19

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Summary

  • Add set -euo pipefail and configurable HOST/PORT env vars to .docker/docker-entrypoint.sh
  • Fix Go formatting (Printf newline, removed semicolon) in 04_image/demo/multistage-builds/app.go
  • Add health endpoint, environment-based config, and Redis error handling in 11_compose/demo/app/app.py

Changes

File Issue Fix
.docker/docker-entrypoint.sh No error handling, hardcoded address Added set -euo pipefail, HOST/PORT env vars
04_image/demo/multistage-builds/app.go Missing newline in output Added \n, removed trailing semicolon
11_compose/demo/app/app.py debug=True security risk, no error handling Env-based debug, Redis try/catch, health endpoint

Test plan

  • Verify docker-entrypoint.sh exits on errors
  • Test Flask app with FLASK_DEBUG=false
  • Verify /health endpoint returns 503 when Redis is down

🤖 Generated with Claude Code

- .docker/docker-entrypoint.sh: add set -euo pipefail, use HOST/PORT env vars
- 04_image/demo/multistage-builds/app.go: fix Printf formatting, add newline
- 11_compose/demo/app/app.py: add health endpoint, env-based config, error handling

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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