Render, Fly, Railway, Docker

One non-root image with a health check; Compose profiles for the stores, observability, decisions and the TLS edge; a Render Blueprint for a demo. Deploy and the production checklist.

# render.yaml at the repository root: New → Blueprint
# docker build -f deploy/Dockerfile -t marg-gateway . && docker run -p 8787:8787 --env-file .env marg-gateway

Docs: https://render.com/docs/blueprint-spec

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Source: docs/integrations/render.md — edit it there; the site mirrors the repository.