Bump base image version of Go environment to 1.11.4 (#1026)

environments/go/Dockerfile-1.11.4

@@ -0,0 +1,21 @@
+ARG GO_VERSION=1.11.4
+
+FROM golang:${GO_VERSION} AS builder
+
+ENV GOPATH /usr
+ENV APP	   ${GOPATH}/src/github.com/fission/fission/environments/go
+
+ADD context	    ${APP}/context
+ADD server.go   ${APP}
+
+WORKDIR ${APP}
+RUN go get
+RUN go build -a -o /server server.go
+
+FROM ubuntu:18.04
+WORKDIR /
+COPY --from=builder /server /
+RUN apt update && apt install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+ENTRYPOINT ["/server"]
+EXPOSE 8888