feat(api-server): add container loadtest observability

deploy/container/docker-compose.loadtest.yml

@@ -0,0 +1,85 @@
+name: genarrative-container-loadtest
+
+services:
+  api-server:
+    build:
+      context: ../..
+      dockerfile: deploy/container/api-server.Dockerfile
+      target: api-runtime
+    env_file:
+      - ./api-server.env
+    environment:
+      GENARRATIVE_API_HOST: 0.0.0.0
+      GENARRATIVE_API_PORT: 8082
+      OTEL_EXPORTER_OTLP_ENDPOINT: http://otelcol:4318
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - api-auth-store:/var/lib/genarrative/auth
+    depends_on:
+      otelcol:
+        condition: service_started
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://127.0.0.1:8082/healthz"]
+      interval: 10s
+      timeout: 3s
+      retries: 12
+      start_period: 20s
+
+  nginx:
+    build:
+      context: ../..
+      dockerfile: deploy/container/api-server.Dockerfile
+      target: nginx-runtime
+    depends_on:
+      api-server:
+        condition: service_healthy
+    ports:
+      - "${GENARRATIVE_CONTAINER_HTTP_PORT:-18080}:80"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - nginx-logs:/var/log/nginx
+    healthcheck:
+      test: ["CMD", "wget", "-qO-", "http://127.0.0.1/api/runtime/puzzle/gallery"]
+      interval: 10s
+      timeout: 5s
+      retries: 12
+      start_period: 20s
+
+  otelcol:
+    image: otel/opentelemetry-collector-contrib:0.125.0
+    command: ["--config=/etc/otelcol/config.yaml"]
+    volumes:
+      - ./otelcol.yaml:/etc/otelcol/config.yaml:ro
+    ports:
+      - "${GENARRATIVE_CONTAINER_OTLP_GRPC_PORT:-4317}:4317"
+      - "${GENARRATIVE_CONTAINER_OTLP_HTTP_PORT:-4318}:4318"
+
+  k6:
+    image: grafana/k6:0.52.0
+    profiles: ["loadtest"]
+    depends_on:
+      nginx:
+        condition: service_healthy
+    environment:
+      BASE_URL: http://nginx
+      WORKS_DATA: data/works-list.sample.json
+      SCENARIO: ${SCENARIO:-spike}
+      START_RPS: ${START_RPS:-5}
+      PEAK_RPS: ${PEAK_RPS:-250}
+      HOLD: ${HOLD:-60s}
+      END_RPS: ${END_RPS:-5}
+      PREALLOCATED_VUS: ${PREALLOCATED_VUS:-100}
+      MAX_VUS: ${MAX_VUS:-500}
+      DETAIL_RATIO: ${DETAIL_RATIO:-0}
+      SLEEP_MIN_SECONDS: ${SLEEP_MIN_SECONDS:-0}
+      SLEEP_MAX_SECONDS: ${SLEEP_MAX_SECONDS:-0}
+    volumes:
+      - ../../scripts/loadtest:/scripts/loadtest:ro
+    working_dir: /scripts/loadtest
+    command: ["run", "k6-works-list.js"]
+
+volumes:
+  api-auth-store:
+  nginx-logs: