chore: добавить каркас image-platform

- добавлен базовый pnpm workspace для будущих приложений

- добавлена dev-инфраструктура PostgreSQL и MinIO

- добавлены env-пример и базовые правила репозитория

- зафиксированы архитектура, data model и API-контракт

- описан контракт с внешним imgproxy

infra/compose.dev.yml

@@ -0,0 +1,51 @@
+name: image-platform
+
+services:
+  postgres:
+    image: postgres:17-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-image_platform}
+      POSTGRES_USER: ${POSTGRES_USER:-image}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-image-password}
+    ports:
+      - "${POSTGRES_PORT:-5433}:5432"
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  minio:
+    image: minio/minio:latest
+    restart: unless-stopped
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-image}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-image-password}
+    ports:
+      - "${MINIO_API_PORT:-9000}:9000"
+      - "${MINIO_CONSOLE_PORT:-9001}:9001"
+    volumes:
+      - minio-data:/data
+
+  minio-init:
+    image: minio/mc:latest
+    depends_on:
+      - minio
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-image}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-image-password}
+      S3_BUCKET: ${S3_BUCKET:-image-platform}
+    entrypoint: ["/bin/sh", "-c"]
+    command: >
+      "until mc alias set local http://minio:9000 $${MINIO_ROOT_USER} $${MINIO_ROOT_PASSWORD}; do sleep 1; done &&
+      mc mb --ignore-existing local/$${S3_BUCKET} &&
+      mc anonymous set download local/$${S3_BUCKET}"
+    restart: "no"
+
+volumes:
+  postgres-data:
+  minio-data: