Create a stack for shopify service (#34)

Part of [Service provider auctions for web deployments](https://www.notion.so/Service-provider-auctions-for-web-deployments-104a6b22d47280dbad51d28aa3a91d75)
- Create a Shopify service that integrates Shopify ecommerce app with the Laconic wallet

Co-authored-by: Neeraj <neeraj.rtly@gmail.com>
Reviewed-on: cerc-io/testnet-laconicd-stack#34

stack-orchestrator/compose/docker-compose-laconic-shopify.yml

@@ -0,0 +1,21 @@
+services:
+  shopify:
+    restart: unless-stopped
+    image: cerc/laconic-shopify:local
+    command: ["bash", "-c", "./start-faucet.sh"]
+    environment:
+      CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
+      CERC_SHOPIFY_GRAPHQL_URL: ${CERC_SHOPIFY_GRAPHQL_URL}
+      CERC_SHOPIFY_ACCESS_TOKEN: ${CERC_SHOPIFY_ACCESS_TOKEN}
+      CERC_FETCH_ORDER_DELAY: ${CERC_FETCH_ORDER_DELAY:-10000}
+      CERC_FAUCET_URL: ${CERC_FAUCET_URL}
+      CERC_ITEMS_PER_ORDER: ${CERC_ITEMS_PER_ORDER:-10}
+    volumes:
+      - shopify-data:/app/data
+      - ../config/laconic-shopify/start-shopify.sh:/app/start-faucet.sh
+      - ../config/laconic-shopify/product_pricings.json:/app/config/product_pricings.json
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+
+volumes:
+  shopify-data: