feat: добавить Image Gateway с кешем Souin

- добавлена сборка Caddy с Souin, Otter и NutsDB

- добавлена конфигурация dev, prod и test Docker Compose

- настроено кеширование через Otter L1 и NutsDB L2

- добавлены e2e-тесты Bun для кеша, restart и purge

- добавлена документация по запуску, API кеша и тестам

docker-compose.dev.yml

@@ -0,0 +1,49 @@
+services:
+  imgproxy:
+    image: darthsim/imgproxy:latest
+    restart: unless-stopped
+    environment:
+      GODEBUG: http2client=0
+      IMGPROXY_WORKERS: ${IMGPROXY_WORKERS:-2}
+      IMGPROXY_MAX_SRC_RESOLUTION: ${IMGPROXY_MAX_SRC_RESOLUTION:-20}
+      IMGPROXY_USE_ETAG: "true"
+      IMGPROXY_ENABLE_VIDEO_THUMBNAILS: "false"
+      IMGPROXY_DOWNLOAD_TIMEOUT: ${IMGPROXY_DOWNLOAD_TIMEOUT:-30}
+      IMGPROXY_ALLOWED_SOURCES: ${IMGPROXY_ALLOWED_SOURCES:-}
+      HTTP_PROXY: ${HTTP_PROXY:-}
+      HTTPS_PROXY: ${HTTPS_PROXY:-}
+      NO_PROXY: ${NO_PROXY:-localhost,127.0.0.1}
+    networks:
+      - gateway
+
+  caddy:
+    build:
+      context: .
+      dockerfile: Dockerfile.caddy
+    restart: unless-stopped
+    ports:
+      - "${CADDY_PORT:-8888}:${CADDY_PORT:-8888}"
+      - "2019:2019"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - caddy-data:/data
+      - caddy-cache:/cache
+    environment:
+      IMGPROXY_UPSTREAM: imgproxy:8080
+      DOMAIN: ""
+      CADDY_PORT: ${CADDY_PORT:-8888}
+      ADMIN_USER: ${ADMIN_USER:-admin}
+      ADMIN_PASS: ${ADMIN_PASS:-}
+    depends_on:
+      imgproxy:
+        condition: service_started
+    networks:
+      - gateway
+
+networks:
+  gateway:
+    driver: bridge
+
+volumes:
+  caddy-data:
+  caddy-cache: