docker: bump golang from 1.25.11-alpine to 1.25.12-alpine (#635)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -12,7 +12,7 @@ COPY src ./src
 RUN npx vite build
 
 # Build the Go binary, including embedded UI files:
-FROM golang:1.25.11-alpine@sha256:523c3effe300580ed375e43f43b1c9b091b68e935a7c3a92bfcc4e7ed55b18c2 AS build-go
+FROM golang:1.25.12-alpine@sha256:56961d79ea8129efddcc0b8643fd8a5416b4e6228cfd477e3fd61deb2672c587 AS build-go
 WORKDIR /go/src/riverui
 
 COPY go.mod go.sum ./

Dockerfile.pro

@@ -12,7 +12,7 @@ COPY src ./src
 RUN npx vite build
 
 # Build the Go binary, including embedded UI files:
-FROM golang:1.25.11-alpine@sha256:523c3effe300580ed375e43f43b1c9b091b68e935a7c3a92bfcc4e7ed55b18c2 AS build-go
+FROM golang:1.25.12-alpine@sha256:56961d79ea8129efddcc0b8643fd8a5416b4e6228cfd477e3fd61deb2672c587 AS build-go
 WORKDIR /go/src/riverui
 
 # Download main module dependencies first