updated go to v1.12.1 and alpine to 3.9.2

Signed-off-by: Nick Adcock <[email protected]>

Author: zappy-shu

Dockerfile

@@ -1,4 +1,4 @@
-FROM dockercore/golang-cross:1.11.5@sha256:17a7e0f158521c50316a0d0c1ab1f6a75350b4d82e7ef03c98bcfbdf04feb4f3 AS build
+FROM dockercore/golang-cross:1.12.1@sha256:8541e3aea7b2cffb7ac310af250e34551abe2ec180c77d5a81ae3d52a47ac779 AS build
 ENV     DISABLE_WARN_OUTSIDE_CONTAINER=1
 
 RUN apt-get install -y -q --no-install-recommends \

Dockerfile.invocation-image

@@ -1,6 +1,6 @@
-ARG ALPINE_VERSION=3.8
+ARG ALPINE_VERSION=3.9.2
 
-FROM dockercore/golang-cross:1.11.5@sha256:17a7e0f158521c50316a0d0c1ab1f6a75350b4d82e7ef03c98bcfbdf04feb4f3 AS build
+FROM dockercore/golang-cross:1.12.1@sha256:8541e3aea7b2cffb7ac310af250e34551abe2ec180c77d5a81ae3d52a47ac779 AS build
 
 RUN apt-get install -y -q --no-install-recommends \
     coreutils \

Dockerfile.lint

@@ -1,5 +1,5 @@
-ARG ALPINE_VERSION=3.8
-ARG GO_VERSION=1.11.0
+ARG ALPINE_VERSION=3.9.2
+ARG GO_VERSION=1.12.1
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION}
 RUN apk add --no-cache \

e2e/testdata/cnab-with-status/cnab/build/Dockerfile

@@ -1,4 +1,4 @@
-ARG ALPINE_VERSION=3.8
+ARG ALPINE_VERSION=3.9.2
 
 FROM alpine:${ALPINE_VERSION}
 

e2e/testdata/cnab-without-status/cnab/build/Dockerfile

@@ -1,4 +1,4 @@
-ARG ALPINE_VERSION=3.8
+ARG ALPINE_VERSION=3.9.2
 
 FROM alpine:${ALPINE_VERSION}
 

vars.mk

@@ -6,7 +6,7 @@ E2E_NAME := $(BIN_NAME)-e2e
 # Enable experimental features. "on" or "off"
 EXPERIMENTAL := off
 
-ALPINE_VERSION=3.8
+ALPINE_VERSION=3.9.2
 
 # Failing to resolve sh.exe to a full path denotes a windows vanilla shell.
 # Although 'simple' commands are still exec'ed, 'complex' ones are batch'ed instead of sh'ed.