URL rewriting not working

tyk-gateway_1 | time=“Feb 15 21:57:52” level=error msg=“http: proxy error: dial tcp 127.0.0.1:80: getsockopt: connection refused” api_id=24c8281d54364c806bfe96915739c096 org_id=589a65006e3931000128cd5c server_name=api.dev.westfield.io user_id=“****5ef4” user_ip=172.19.0.1 user_name="[email protected]"