docker: add support for arm64, ppc64le, s390x, i386, armv7, armv6

docker/build: enable experimental cli in hooks

docker/build: Add DOCKER_BUILDKIT=1 to build config

See https://docs.docker.com/docker-hub/builds/#build-images-with-buildkit

.pre-commit-config.yaml

@@ -53,7 +53,7 @@ repos:
     hooks:
     -   id: docker-build-client
         name: Docker - build client
-        entry: bash -c 'docker build client/'
+        entry: bash -c '<client/Dockerfile sed "s/--platform.*BUILDPLATFORM//g" | docker build -f - client/'
         language: system
         types: [file]
         files: client/

client/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:9 as builder
+FROM --platform=$BUILDPLATFORM node:9 as builder
 WORKDIR /opt/app
 
 COPY package.json package-lock.json ./
@@ -11,7 +11,7 @@ ARG CLIENT_BUILD_ARGS=""
 RUN BASE_URL="__BASEURL__" node build.js --gzip ${CLIENT_BUILD_ARGS}
 
 
-FROM scratch as approot
+FROM --platform=$BUILDPLATFORM scratch as approot
 
 COPY docker-start.sh /
 

client/hooks/build

@@ -7,8 +7,11 @@ else
 	BUILD_INFO="v${CLOSEST_VER}-edge-$(git rev-parse --short ${SOURCE_COMMIT})"
 fi
 
+export DOCKER_CLI_EXPERIMENTAL=enabled
+export DOCKER_BUILDKIT=1
 echo "Using BUILD_INFO=${BUILD_INFO}"
-docker build \
+docker buildx build \
+	--platform linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/386,linux/arm/v7,linux/arm/v6 \
 	--build-arg BUILD_INFO=${BUILD_INFO} \
 	--build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
 	--build-arg SOURCE_COMMIT \

client/hooks/pre_build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+export DOCKER_CLI_EXPERIMENTAL=enabled
+export DOCKER_BUILDKIT=1
+docker buildx create --use

server/hooks/build

@@ -1,6 +1,9 @@
 #!/bin/sh
 
-docker build \
+export DOCKER_CLI_EXPERIMENTAL=enabled
+export DOCKER_BUILDKIT=1
+docker buildx build \
+	--platform linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/386,linux/arm/v7,linux/arm/v6 \
 	--build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') \
 	--build-arg SOURCE_COMMIT \
 	--build-arg DOCKER_REPO \

server/hooks/pre_build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+export DOCKER_CLI_EXPERIMENTAL=enabled
+export DOCKER_BUILDKIT=1
+docker buildx create --use