refactor(infra) : reorganize docker config into infra/dev and infra/prod

Align project structure with Lesstime: move docker/ to infra/dev/ and
deploy/ to infra/prod/. Update all references in docker-compose,
makefile, CI workflow, Dockerfile, .gitignore and .dockerignore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/prod/docker-compose.yml

@@ -0,0 +1,12 @@
+services:
+  app:
+    image: gitea.malio.fr/malio-dev/inventory:${INVENTORY_IMAGE_TAG:-latest}
+    container_name: inventory-app
+    env_file: .env
+    ports:
+      - "8082:80"
+    volumes:
+      - ./storage:/var/www/html/var/storage/documents
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    restart: unless-stopped