Fix Dockerfile for build with latest docker versions

.github/workflows/docker-image.yml

@@ -0,0 +1,37 @@
+name: docker-build-arm-and-push
+
+on:
+  push:
+    branches:
+      - 'master'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile.arm
+          platforms: linux/arm64,linux/arm/v7,linux/arm/v6
+          push: true
+          tags: |
+            ghcr.io/lucacalcaterra/traefik-forward-auth:arm

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-alpine as builder
+FROM golang:1.24-alpine3.21 AS builder
 
 # Setup
 RUN mkdir -p /go/src/github.com/thomseddon/traefik-forward-auth