build: upgrade to Go 1.27

Bumps the toolchain in go.mod, both golang base images in the Dockerfile, and
the devcontainer VARIANT. CI needs no change, as the workflows resolve the
version through go-version-file: go.mod.

Tests, race tests, build and vet all pass on go1.27.0.

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
 		"dockerfile": "Dockerfile",
 		"args": {
 			// Update the VARIANT arg to pick a version of Go: 1, 1.15, 1.14
-			"VARIANT": "1.26",
+			"VARIANT": "1.27",
 			// Options
 			"INSTALL_NODE": "true",
 			"NODE_VERSION": "v24"

Dockerfile

@@ -43,7 +43,7 @@ COPY --from=ui /build /build
 
 ########################################################################################################################
 ### Build Navidrome binary for Docker image (dynamic musl, enables native libwebp via dlopen)
-FROM --platform=$BUILDPLATFORM golang:1.26-alpine AS build-alpine
+FROM --platform=$BUILDPLATFORM golang:1.27-alpine AS build-alpine
 COPY --from=xx / /
 
 ARG TARGETPLATFORM
@@ -85,7 +85,7 @@ EOT
 
 ########################################################################################################################
 ### Build Navidrome binary for standalone distribution (static glibc, cross-compiled)
-FROM --platform=$BUILDPLATFORM golang:1.26-trixie AS base
+FROM --platform=$BUILDPLATFORM golang:1.27-trixie AS base
 RUN apt-get update && apt-get install -y clang lld
 COPY --from=xx / /
 WORKDIR /workspace

go.mod

@@ -1,6 +1,6 @@
 module github.com/navidrome/navidrome
 
-go 1.26
+go 1.27
 
 // Fork to implement raw tags support
 replace go.senan.xyz/taglib => github.com/deluan/go-taglib v0.0.0-20260720134629-a133b9719ea3