add a default docker-compose for e2e tests

demos/weather_forecast/docker-compose.yaml

@@ -0,0 +1,41 @@
+services:
+  weather_forecast_service:
+    build:
+      context: ../shared/weather_forecast_service
+    environment:
+      - OLTP_HOST=http://jaeger:4317
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    ports:
+      - "18083:80"
+
+  chatbot_ui:
+    build:
+      context: ../shared/chatbot_ui
+    ports:
+      - "18080:8080"
+    environment:
+      # this is only because we are running the sample app in the same docker container environemtn as archgw
+      - CHAT_COMPLETION_ENDPOINT=http://host.docker.internal:10000/v1
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - ./arch_config.yaml:/app/arch_config.yaml
+
+  jaeger:
+    build:
+      context: ../shared/jaeger
+    ports:
+      - "16686:16686"
+      - "4317:4317"
+      - "4318:4318"
+
+  prometheus:
+    build:
+      context: ../shared/prometheus
+
+  grafana:
+    build:
+      context: ../shared/grafana
+    ports:
+      - "3000:3000"