Build push action v2

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

test/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine
+
+RUN echo "Hello world!"

test/Dockerfile-multi

@@ -0,0 +1,8 @@
+FROM --platform=$BUILDPLATFORM golang:alpine AS build
+
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM" > /log
+
+FROM alpine
+COPY --from=build /log /log

test/Dockerfile-multi-golang

@@ -0,0 +1,30 @@
+FROM --platform=${BUILDPLATFORM:-linux/amd64} tonistiigi/xx:golang AS xgo
+FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.13-alpine AS builder
+
+ENV CGO_ENABLED 0
+ENV GO111MODULE on
+ENV GOPROXY https://goproxy.io
+COPY --from=xgo / /
+
+ARG TARGETPLATFORM
+RUN go env
+
+RUN apk --update --no-cache add \
+    build-base \
+    gcc \
+    git \
+  && rm -rf /tmp/* /var/cache/apk/*
+
+WORKDIR /app
+
+ENV DIUN_VERSION="v4.4.0"
+
+RUN git clone --branch ${DIUN_VERSION} https://github.com/crazy-max/diun .
+RUN go mod download
+RUN go build -ldflags "-w -s -X 'main.version=test'" -v -o diun cmd/main.go
+
+FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:latest
+
+COPY --from=builder /app/diun /usr/local/bin/diun
+COPY --from=builder /usr/local/go/lib/time/zoneinfo.zip /usr/local/go/lib/time/zoneinfo.zip
+RUN diun --version

test/Dockerfile-multi-sudo

@@ -0,0 +1,22 @@
+FROM --platform=$BUILDPLATFORM golang:alpine AS build
+
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM" > /log
+
+RUN apk --update --no-cache add \
+    shadow \
+    sudo \
+  && addgroup -g 1200 buildx \
+  && adduser -u 1200 -G buildx -s /sbin/nologin -D buildx \
+  && echo 'buildx ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers \
+  && rm -rf /tmp/* /var/cache/apk/*
+
+USER buildx
+RUN sudo chown buildx. /log
+USER root
+
+FROM alpine
+
+COPY --from=build /log /log
+RUN ls -al /log