Pass OAuth env vars into Docker container via docker-compose

Variables were defined in .env but never forwarded to the app container,
so config/services.php could not read them.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -23,6 +23,9 @@ services:
       SHOPIFY_SHOP_DOMAIN: "${SHOPIFY_SHOP_DOMAIN}"
       SHOPIFY_ACCESS_TOKEN: "${SHOPIFY_ACCESS_TOKEN}"
       SHOPIFY_WEBHOOK_SECRET: "${SHOPIFY_WEBHOOK_SECRET}"
+      OAUTH_CLOUDSPICESBLUE_ID: "${OAUTH_CLOUDSPICESBLUE_ID}"
+      OAUTH_CLOUDSPICESBLUE_SECRETKEY: "${OAUTH_CLOUDSPICESBLUE_SECRETKEY}"
+      OAUTH_CLOUDSPICESBLUE_REDIRECTURI: "${OAUTH_CLOUDSPICESBLUE_REDIRECTURI}"
     volumes:
       - storage_uploads:/app/storage/app
       - storage_logs:/app/storage/logs