Bump Go to 1.12.6 and Alpine to 3.10.0

Signed-off-by: Christopher Crone <christopher.crone@docker.com>

Author: chris-crone

Dockerfile

@@ -1,4 +1,4 @@
-FROM dockercore/golang-cross:1.12.5@sha256:15b5f9805c0395d3ad80f9354ee358312e1abe3a683ce80371ad0551199ff253 AS build
+FROM dockercore/golang-cross:1.12.6@sha256:5f4272cb7723c6f28e76abfd8b59e46d8f7264b0cf2d000ff49aee1d0577e7d0 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=3.9.4
+ARG ALPINE_VERSION=3.10.0
 
-FROM dockercore/golang-cross:1.12.5@sha256:15b5f9805c0395d3ad80f9354ee358312e1abe3a683ce80371ad0551199ff253 AS build
+FROM dockercore/golang-cross:1.12.6@sha256:5f4272cb7723c6f28e76abfd8b59e46d8f7264b0cf2d000ff49aee1d0577e7d0 AS build
 
 RUN apt-get install -y -q --no-install-recommends \
     coreutils \

Dockerfile.lint

@@ -1,5 +1,5 @@
-ARG ALPINE_VERSION=3.9
-ARG GO_VERSION=1.12.5
+ARG ALPINE_VERSION=3.10
+ARG GO_VERSION=1.12.6
 
 FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION}
 RUN apk add --no-cache \

vars.mk

@@ -6,7 +6,7 @@ E2E_NAME := $(BIN_NAME)-e2e
 # Enable experimental features. "on" or "off"
 EXPERIMENTAL := off
 
-ALPINE_VERSION=3.9.4
+ALPINE_VERSION=3.10.0
 
 # 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.