fix: add curl to chat runtime image for healthcheck

.gitea/workflows/cd.yml

@@ -1,13 +1,17 @@
 name: CD
 
 on:
-  push:
+  workflow_run:
+    workflows: ["CI"]
+    types:
+      - completed
     branches: [main]
   workflow_dispatch:
 
 jobs:
   deploy:
     runs-on: [ubuntu-latest]
+    if: ${{ github.event.workflow_run.conclusion == 'success' || github.event_name == 'workflow_dispatch' }}
     environment: production
     steps:
       - name: Checkout code

docs/architecture/README.md

@@ -217,6 +217,65 @@ Notable aspects: Manifest freshness ensures all viewers stay on same timeline; c
 
 ## Deployment View
 
+### CI/CD Pipeline Architecture
+
+The deployment follows a two-stage pipeline: **CI builds and pushes images**, then **CD pulls and deploys** them to the production host.
+
+```mermaid
+flowchart LR
+    subgraph "Gitea Actions"
+        CI[CI Workflow<br/>Build + Push Images]
+        CD[CD Workflow<br/>Pull + Deploy]
+    end
+    subgraph "Gitea Container Registry"
+        REGISTRY[git.allucanget.biz<br/>playout:latest<br/>chat:latest<br/>nginx:latest]
+    end
+    subgraph "Production Host (192.168.88.40)"
+        DOCKER[Docker Engine<br/>via TCP :2375]
+        PLAYOUT[linearvoid-playout]
+        CHAT[linearvoid-chat]
+        NGINX[linearvoid-nginx]
+        REDIS[linearvoid-redis]
+        DB[linearvoid-db]
+        PROM[linearvoid-prometheus]
+        GRAF[linearvoid-grafana]
+    end
+
+    CI -->|push| REGISTRY
+    REGISTRY -->|pull| CD
+    CD -->|deploy via DOCKER_HOST| DOCKER
+    DOCKER --> PLAYOUT
+    DOCKER --> CHAT
+    DOCKER --> NGINX
+    DOCKER --> REDIS
+    DOCKER --> DB
+    DOCKER --> PROM
+    DOCKER --> GRAF
+
+    classDef ci fill:#e1f5fe,stroke:#0288d1
+    classDef reg fill:#fff3e0,stroke:#f57c00
+    classDef prod fill:#e8f5e9,stroke:#388e3c
+    class CI,CD ci
+    class REGISTRY reg
+    class DOCKER,PLAYOUT,CHAT,NGINX,REDIS,DB,PROM,GRAF prod
+```
+
+**Pipeline Sequence:**
+
+1. **CI Workflow** (`.gitea/workflows/ci.yml`):
+   - Triggers on `push` to `main` or `pull_request`
+   - Runs `test` job: frontend lint/build, Go validation, `docker compose build`
+   - Runs `docker` job (after `test` passes, only on `main` push):
+     - Builds `playout`, `chat`, `nginx` images with Buildx
+     - Pushes to Gitea Container Registry with `main` and `latest` tags
+2. **CD Workflow** (`.gitea/workflows/cd.yml`):
+   - Triggers on `workflow_run` when CI completes successfully, or manually via `workflow_dispatch`
+   - Pulls latest images from registry
+   - Generates `.env` from secrets
+   - Seeds Prometheus config into named volume
+   - Deploys via `docker compose -f docker-compose.prod.yml up -d` to remote host (`192.168.88.40:2375`)
+   - Runs health checks with retry logic for playout initialization
+
 ### Infrastructure Level 1
 
 **Overview Diagram**: See Mermaid in Building Block section (VPS + Cloudflare R2/Pages/CDN).