Restructured Dockerfile

- Simpler flow for the same build speed
- ARM compatibility
- Upgraded Alpine to 3.10
- Upgraded Go to 1.12.6

Dockerfile

@@ -1,11 +1,33 @@
-ARG ALPINE_VERSION=3.8
+ARG BASE_IMAGE_BUILDER_GO=golang
-ARG GO_VERSION=1.11.4
+ARG BASE_IMAGE_BUILDER_NODE=alpine
+ARG ALPINE_VERSION=3.10
+ARG GO_VERSION=1.12.6
 ARG STACKEDIT_VERSION=v5.13.3
 
-FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS builder
+FROM ${BASE_IMAGE_BUILDER_GO}:${GO_VERSION}-alpine${ALPINE_VERSION} AS server
+ARG GOARCH=amd64
+ARG GOARM
+ARG BINCOMPRESS
 RUN apk --update add git build-base upx
 RUN go get -u -v golang.org/x/vgo
 WORKDIR /tmp/gobuild
+COPY go.mod go.sum ./
+RUN go mod download
+COPY *.go ./
+#RUN go test -v -race ./...
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${GOARCH} GOARM=${GOARM} go build -a -installsuffix cgo -ldflags="-s -w" -o app
+RUN [ "${BINCOMPRESS}" == "" ] || (upx -v --best --lzma --overlay=strip app && upx -t app)
+
+FROM ${BASE_IMAGE_BUILDER_NODE}:${ALPINE_VERSION} AS stackedit
+ARG STACKEDIT_VERSION
+WORKDIR /stackedit
+RUN apk add -q --progress --update --no-cache git npm
+RUN wget -q https://github.com/benweet/stackedit/archive/${STACKEDIT_VERSION}.tar.gz -O stackedit.tar.gz && \
+    tar -xzf stackedit.tar.gz --strip-components=1 && \
+    rm stackedit.tar.gz
+#ENV NODE_ENV production
+RUN npm install
+RUN npm run build
 
 FROM scratch AS final
 ARG BUILD_DATE
@@ -30,26 +52,5 @@ EXPOSE 8000
 HEALTHCHECK --start-period=1s --interval=100s --timeout=2s --retries=1 CMD ["/server","healthcheck"]
 USER 1000
 ENTRYPOINT ["/server"]
-
-FROM alpine:${ALPINE_VERSION} AS stackedit
-ARG STACKEDIT_VERSION
-WORKDIR /stackedit
-RUN apk add -q --progress --update --no-cache git npm
-RUN wget -q https://github.com/benweet/stackedit/archive/${STACKEDIT_VERSION}.tar.gz -O stackedit.tar.gz && \
-    tar -xzf stackedit.tar.gz --strip-components=1 && \
-    rm stackedit.tar.gz
-#ENV NODE_ENV production
-RUN npm install
-RUN npm run build
-
-FROM builder AS server
-COPY go.mod go.sum ./
-RUN go mod download
-COPY *.go ./
-#RUN go test -v -race ./...
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -ldflags="-s -w" -o app .
-RUN [ "${BINCOMPRESS}" == "" ] || (upx -v --best --lzma --overlay=strip app && upx -t app)
-
-FROM final
 COPY --from=stackedit --chown=1000 /stackedit/dist /html
 COPY --from=server --chown=1000 /tmp/gobuild/app /server