Facing Deployment issue

Question

i have uploaded the DB and backend code and added the DB environment variables into backend variables and changed some DB config in code side but even after changing this 502 bad gateway issue i share a scrrenshot  and kindly guide me to fix this issue .

requestId:
"qFQTp0L9QGqpdpp-acI7Nw"
timestamp:
"2025-08-14T09:59:47.415854475Z"
method:
"GET"
path:
"/"
host:
"medyaanvetbackend-production.up.railway.app"
httpStatus:
502
upstreamProto:
""
downstreamProto:
"HTTP/2.0"
responseDetails:
"Retried single replica"
totalDuration:
15169
upstreamAddress:
""
clientUa:
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36"
upstreamRqDuration:
15012
txBytes:
4682
rxBytes:
799
srcIp:
"14.195.196.110"
edgeRegion:
"asia-southeast1-eqsg3a"
upstreamErrors:
"[{"deploymentInstanceID":"71684870-bb4f-4c58-81fa-3b2caef71817","duration":5007,"error":"connection dial timeout"},{"deploymentInstanceID":"71684870-bb4f-4c58-81fa-3b2caef71817","duration":5000,"error":"connection dial timeout"},{"deploymentInstanceID":"71684870-bb4f-4c58-81fa-3b2caef71817","duration":5005,"error":"connection dial timeout"}]"