feat(infra): containerize BFF + compose-up smoke (closes #29) (#36)

infra/docker-compose.yml

@@ -0,0 +1,19 @@
+# Local development stack. Grows service-by-service with each slice.
+# S-00-b: the placeholder BFF with a /health check.
+#
+#   docker compose -f infra/docker-compose.yml up -d --build --wait
+#   curl http://localhost:8080/health   # -> Healthy
+services:
+  bff:
+    build:
+      context: ../services/bff
+      dockerfile: Dockerfile
+    image: register-referentie/bff:dev
+    ports:
+      - "8080:8080"
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:8080/health"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+      start_period: 10s