Add Go 1.13 support and upgrade Go 1.12 version (#1507)

environments/go/Dockerfile-1.12

@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.12.7
+ARG GO_VERSION=1.12
 
 FROM ubuntu:18.04 AS base
 WORKDIR /

environments/go/Dockerfile-1.13

@@ -0,0 +1,24 @@
+ARG GO_VERSION=1.13
+
+FROM ubuntu:18.04 AS base
+WORKDIR /
+RUN apt update && apt install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+FROM golang:${GO_VERSION} AS builder
+
+ENV GOPATH /usr
+ENV APP	   ${GOPATH}/src/github.com/fission/fission/environments/go
+
+WORKDIR ${APP}
+
+ADD context	    ${APP}/context
+ADD server.go   ${APP}
+
+RUN go get
+RUN go build -a -o /server server.go
+
+FROM base
+COPY --from=builder /server /
+
+ENTRYPOINT ["/server"]
+EXPOSE 8888

environments/go/builder/Dockerfile-1.12

@@ -1,5 +1,5 @@
 ARG BUILDER_IMAGE=fission/builder
-ARG GO_VERSION=1.12.7
+ARG GO_VERSION=1.12
 
 FROM ${BUILDER_IMAGE}
 

environments/go/builder/Dockerfile-1.13

@@ -0,0 +1,14 @@
+ARG BUILDER_IMAGE=fission/builder
+ARG GO_VERSION=1.13
+
+FROM ${BUILDER_IMAGE}
+
+FROM golang:${GO_VERSION}
+
+ENV GOPATH /usr
+ENV GO111MODULE on
+WORKDIR ${GOPATH}
+
+COPY --from=0 /builder /builder
+ADD build.sh /usr/local/bin/build
+