add support for arm64 docker builds using Buildx+QEMU (#152)

Co-authored-by: flexxxxer <bahx4pc@gmail.com>

.github/workflows/docker-image.yml

@@ -22,9 +22,13 @@ jobs:
         steps:
             - name: Checkout repository
               uses: actions/checkout@v4
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v3
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
             # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
             - name: Log in to the Container registry
-              uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+              uses: docker/login-action@v3
               with:
                   registry: ${{ env.REGISTRY }}
                   username: ${{ github.actor }}
@@ -32,16 +36,17 @@ jobs:
             # This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.
             - name: Extract metadata (tags, labels) for Docker
               id: meta
-              uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+              uses: docker/metadata-action@v5
               with:
                   images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
             # This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.
             # It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.
             # It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.
             - name: Build and push Docker image
-              uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+              uses: docker/build-push-action@v6
               with:
                   context: .
                   push: true
+                  platforms: linux/amd64,linux/arm64
                   tags: ${{ steps.meta.outputs.tags }}
-                  labels: ${{ steps.meta.outputs.labels }}
+                  labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.22.1-alpine3.19 as build
+FROM golang:1.22.1-alpine3.19 AS build
 
 WORKDIR /app
 
@@ -9,7 +9,10 @@ RUN go mod download
 
 COPY . .
 
-ENV CGO_ENABLED=0
+# Architecture and OS are set dynamically (by BuildKit)
+ARG TARGETOS
+ARG TARGETARCH
+ENV CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH
 
 RUN go build -o anonymousoverflow && go build -o healthcheck ./src/healthcheck
 

README.md

@@ -43,7 +43,7 @@ StackOverflow has a cluttered UI that might distract you from the content you're
 
 The open-source [Libredirect](https://github.com/libredirect/libredirect) extension for Firefox and Chromium-based desktop browsers has support for redirections to AnonymousOverflow. To enable this, simply open the extension settings, click on Stack Overflow, then toggle "Enable". That's it, now Stack Overflow links will go to AnonymousOverflow.
 
-The open-source [FREEdirector](https://openuserjs.org/scripts/sjehuda/FREEdirector) user.js script for web browsers with userscript support. You can install it with a web extension like [Greasemonkey](https://greasespot.net/), [Tampermonkey](https://tampermonkey.net/) or [Violentmonkey](https://violentmonkey.github.io/). Once installed, Stack Overflow links will go to AnonymousOverflow.
+The open-source [Proxy_Redirect](https://openuserjs.org/scripts/sjehuda/Proxy_Redirect) user.js script for web browsers with userscript support. You can install it with a web extension like [Greasemonkey](https://greasespot.net/), [Tampermonkey](https://tampermonkey.net/) or [Violentmonkey](https://violentmonkey.github.io/). Once installed, Stack Overflow links will go to AnonymousOverflow.
 
 ## How it works
 

instances.json

@@ -123,7 +123,7 @@
         {
             "url": "https://soflow.nerdvpn.de",
             "regions": ["Ukraine"],
-            "operators": ["https://github.com/Sommerwiesel"]
+            "operators": ["https://nerdvpn.de"]
         },
         {
             "url": "https://overflow.einfachzocken.eu/",

main.go

@@ -86,6 +86,8 @@ func main() {
 
 	r.GET("/proxy", routes.GetImage)
 
+	r.GET("/version", routes.GetVersion)
+
 	soPingCheck := checks.NewPingCheck("https://stackoverflow.com", "GET", 5000, nil, nil)
 	sePingCheck := checks.NewPingCheck("https://stackexchange.com", "GET", 5000, nil, nil)
 	healthcheck.New(r, config.DefaultConfig(), []checks.Check{soPingCheck, sePingCheck})

src/routes/version.go

@@ -0,0 +1,10 @@
+package routes
+
+import (
+	"anonymousoverflow/config"
+	"github.com/gin-gonic/gin"
+)
+
+func GetVersion(c *gin.Context) {
+	c.String(200, config.Version)
+}