feat: add docker compose entry for drainer service (#504)

docker-compose.yml

@@ -212,4 +212,27 @@ services:
     ports:
       - "3200" # tempo
       - "4317" # otlp grpc
-    restart: unless-stopped
+    restart: unless-stopped
+  hyperswitch-drainer:
+    image: rust:1.65
+    command: cargo run --bin drainer -- -f ./config/docker_compose.toml
+    working_dir: /app
+    deploy:
+      replicas: ${DRAINER_INSTANCE_COUNT:-1}
+    networks:
+      - router_net
+    profiles:
+      - full_kv
+    volumes:
+      - ./:/app
+      - cargo_cache:/cargo_cache
+      - cargo_build_cache:/cargo_build_cache
+    environment:
+      - CARGO_TARGET_DIR=/cargo_build_cache
+      - OTEL_EXPORTER_OTLP_ENDPOINT=https://otel-collector:4317
+    restart: unless-stopped
+    depends_on:
+      hyperswitch-server:
+        condition: service_healthy
+    labels:
+      logs: "promtail"