Update Dockerfile to Go 1.25 to match go.mod requirement

Author: nmn3m

backend/Dockerfile

@@ -1,5 +1,5 @@
 # Build stage
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 WORKDIR /app
 

backend/go.mod

@@ -31,6 +31,7 @@ require (
 	go.opentelemetry.io/otel/sdk/metric v1.39.0
 	go.uber.org/zap v1.27.1
 	golang.org/x/crypto v0.44.0
+	golang.org/x/time v0.15.0
 )
 
 require (
@@ -77,7 +78,6 @@ require (
 	golang.org/x/net v0.47.0 // indirect
 	golang.org/x/sys v0.39.0 // indirect
 	golang.org/x/text v0.31.0 // indirect
-	golang.org/x/time v0.15.0 // indirect
 	golang.org/x/tools v0.38.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20251202230838-ff82c1b0f217 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20251202230838-ff82c1b0f217 // indirect