feat: Docker Compose full stack with health checks

[igorsatsyuk]

Summary

• add health checks for blockchain, backend services, and frontend
• gate startup order with depends_on health conditions
• add container build/runtime definitions for backend services and Angular frontend
• document Docker Compose startup and verification steps
• mark ROADMAP item as complete

Closes #31

[Copilot]

Pull request overview

This PR adds Docker Compose support for running the DID IdP stack with containerized backend services, Angular frontend, and health-gated startup.

Changes:

• Adds Dockerfiles for all backend services and the Angular frontend.
• Adds Compose health checks, service dependencies, and frontend reverse proxy routing.
• Updates environment examples, README startup instructions, and marks the roadmap item complete.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
deploy/docker-compose.yml	Adds health checks, env validation, dependency gates, and frontend service.
deploy/.env.example	Updates local demo defaults and required Compose variables.
backend/identity-service/Dockerfile	Adds container build/runtime definition for identity service.
backend/auth-bridge-service/Dockerfile	Adds container build/runtime definition for auth bridge service.
backend/resource-api/Dockerfile	Adds container build/runtime definition for resource API.
frontend/did-ui/Dockerfile	Adds Angular build and nginx runtime image.
frontend/did-ui/docker/nginx.conf	Adds SPA hosting and backend proxy routes.
README.md	Documents Docker Compose startup, health verification, and shutdown.
ROADMAP.md	Marks Docker Compose health-check work as complete.

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated no new comments.