Add linux/arm64 platform to docker build

Author: bdovaz

.github/workflows/deploy-ALPHA-flavors.yml

@@ -89,7 +89,7 @@ jobs:
           IMAGE_REPO: oxsecurity/megalinter-${{ matrix.flavor }}
           IMAGE_VERSION: alpha
           DOCKERFILE_PATH: flavors/${{ matrix.flavor }}/Dockerfile
-          DOCKER_BUILD_PLATFORMS: linux/amd64
+          DOCKER_BUILD_PLATFORMS: linux/amd64,linux/arm64
           REGISTRY: Docker
           SQUASH: "true"
         shell: bash
@@ -106,7 +106,7 @@ jobs:
           IMAGE_REPO: oxsecurity/megalinter-${{ matrix.flavor }}
           IMAGE_VERSION: alpha
           DOCKERFILE_PATH: flavors/${{ matrix.flavor }}/Dockerfile
-          DOCKER_BUILD_PLATFORMS: linux/amd64
+          DOCKER_BUILD_PLATFORMS: linux/amd64,linux/arm64
           REGISTRY: GCR
           SQUASH: "true"
         shell: bash

.github/workflows/deploy-ALPHA.yml

@@ -69,7 +69,7 @@ jobs:
           IMAGE_REPO: oxsecurity/megalinter
           IMAGE_VERSION: alpha
           DOCKERFILE_PATH: Dockerfile
-          DOCKER_BUILD_PLATFORMS: linux/amd64
+          DOCKER_BUILD_PLATFORMS: linux/amd64,linux/arm64
           REGISTRY: Docker
         shell: bash
         run: .automation/upload-docker.sh
@@ -86,7 +86,7 @@ jobs:
           IMAGE_REPO: oxsecurity/megalinter
           IMAGE_VERSION: alpha
           DOCKERFILE_PATH: Dockerfile
-          DOCKER_BUILD_PLATFORMS: linux/amd64
+          DOCKER_BUILD_PLATFORMS: linux/amd64,linux/arm64
           REGISTRY: GCR
         shell: bash
         run: .automation/upload-docker.sh