Added multi-cpu arch - fixed #6

.github/workflows/publish_master.yaml

@@ -0,0 +1,19 @@
+name: Build and push Docker image
+
+on:
+    push:
+        branches:
+            - master
+
+jobs:
+    build-publish-docker-hub:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: azure/docker-login@v1
+              with:
+                  username: ${{ secrets.REGISTRY_USERNAME }}
+                  password: ${{ secrets.REGISTRY_PASSWORD }}
+            - uses: actions/checkout@v1
+            - name: Build and Push Edge to DockerHub
+              shell: bash
+              run: ./dev-scripts/build_and_push.sh

dev-scripts/build_and_push.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Exit early if any command fails
+set -e
+
+# Print all commands
+set -x
+
+pwd
+
+# ensure you're not running it on local machine
+if [ -z "$CI" ] || [ -z "$GITHUB_REF" ]; then
+    echo "Running on a local machine! Exiting!"
+    exit 127
+else
+    echo "Running on CI"
+fi
+
+# BRANCH=$(git rev-parse --abbrev-ref HEAD)
+# On Github the line above does not work, instead:
+BRANCH=${GITHUB_REF##*/}
+echo "on branch $BRANCH"
+if [[ "$BRANCH" != "master" ]]; then
+    echo 'Not on master branch! Aborting script!'
+    exit 1
+fi
+
+git clean -fdx .
+
+GIT_COMMIT_HASH=$(git rev-parse --short "$GITHUB_SHA")
+
+docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+export DOCKER_CLI_EXPERIMENTAL=enabled
+docker buildx ls
+docker buildx create --name mybuilder
+docker buildx use mybuilder
+
+IMAGE_NAME=caprover/nginx-redirect
+IMAGE_VERSION=1-$GIT_COMMIT_HASH
+
+docker buildx build --platform linux/amd64,linux/arm64,linux/arm -t $IMAGE_NAME:$IMAGE_VERSION -t $IMAGE_NAME:latest -f Dockerfile --push .