Migrate CI to single-step DinD with Fabio/Consul

Replace 5-step pipeline (build/test/push/push/deploy) with single
docker:dind step that builds and deploys in-place via Docker socket.

- .woodpecker.yml: single-step DinD, 1 secret (SECRET_KEY)
- docker-compose.fabio.yml: overlay with SERVICE_* labels for Registrator
- docker-compose.yml: add ports without host bind (Fabio/Traefik routing)
- docker-compose.dev.yml: named volumes with bind driver
- Dockerfiles: install curl, HEALTHCHECK via curl /api/health
- Makefile: docker-fabio, consul-services, fabio-routes targets

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

docker/docker-compose.fabio.yml

@@ -0,0 +1,14 @@
+# Overlay Fabio — combine avec : docker compose -f docker-compose.yml -f docker-compose.fabio.yml
+
+services:
+  backend:
+    labels:
+      - SERVICE_8000_CHECK_HTTP=${SERVICE_8000_CHECK_HTTP:-/api/health}
+      - SERVICE_8000_NAME=${SERVICE_8000_NAME:-${COMPOSE_PROJECT_NAME:-sejeteralo}-backend-8000}
+      - SERVICE_8000_TAGS=${SERVICE_8000_TAGS:-urlprefix-sejeteralo.org:443/api}
+
+  frontend:
+    labels:
+      - SERVICE_3000_CHECK_HTTP=${SERVICE_3000_CHECK_HTTP:-/}
+      - SERVICE_3000_NAME=${SERVICE_3000_NAME:-${COMPOSE_PROJECT_NAME:-sejeteralo}-frontend-3000}
+      - SERVICE_3000_TAGS=${SERVICE_3000_TAGS:-urlprefix-sejeteralo.org:443/*}