Bump Go to 1.27.0.

Dockerfile

@@ -14,7 +14,7 @@ RUN if [ -f ui/package.json ]; then \
 RUN mkdir -p /out-ui/dist && cp -r ui/dist/* /out-ui/dist/ 2>/dev/null || cp -r ui/dist /out-ui/ 2>/dev/null || true
 
 # 2. Build Go binary (embeds the dist produced above or the placeholder)
-FROM golang:1.25-alpine AS go-builder
+FROM golang:1.27-alpine AS go-builder
 WORKDIR /src
 RUN apk add --no-cache git ca-certificates
 COPY go.mod go.sum ./

go.mod

@@ -1,6 +1,6 @@
 module helix-proxy
 
-go 1.25.4
+go 1.27.0
 
 require (
 	github.com/go-acme/lego/v4 v4.35.2