fix: update to 8.12.0 (#852)

https://nodejs.org/en/blog/release/v8.12.0/

Author: SimenB

8/alpine/Dockerfile

@@ -1,6 +1,6 @@
-FROM alpine:3.6
+FROM alpine:3.8
 
-ENV NODE_VERSION 8.11.4
+ENV NODE_VERSION 8.12.0
 
 RUN addgroup -g 1000 node \
     && adduser -u 1000 -G node -s /bin/sh -D node \
@@ -46,7 +46,7 @@ RUN addgroup -g 1000 node \
     && rm -Rf "node-v$NODE_VERSION" \
     && rm "node-v$NODE_VERSION.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt
 
-ENV YARN_VERSION 1.6.0
+ENV YARN_VERSION 1.9.4
 
 RUN apk add --no-cache --virtual .build-deps-yarn curl gnupg tar \
   && for key in \

8/jessie/Dockerfile

@@ -21,7 +21,7 @@ RUN set -ex \
     gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
   done
 
-ENV NODE_VERSION 8.11.4
+ENV NODE_VERSION 8.12.0
 
 RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && case "${dpkgArch##*-}" in \
@@ -41,7 +41,7 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
   && ln -s /usr/local/bin/node /usr/local/bin/nodejs
 
-ENV YARN_VERSION 1.6.0
+ENV YARN_VERSION 1.9.4
 
 RUN set -ex \
   && for key in \

8/onbuild/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:8.11.4-jessie
+FROM node:8.12.0-jessie
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app

8/slim/Dockerfile

@@ -21,7 +21,7 @@ RUN set -ex \
     gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
   done
 
-ENV NODE_VERSION 8.11.4
+ENV NODE_VERSION 8.12.0
 
 RUN buildDeps='xz-utils' \
     && ARCH= && dpkgArch="$(dpkg --print-architecture)" \
@@ -46,7 +46,7 @@ RUN buildDeps='xz-utils' \
     && apt-get purge -y --auto-remove $buildDeps \
     && ln -s /usr/local/bin/node /usr/local/bin/nodejs
 
-ENV YARN_VERSION 1.6.0
+ENV YARN_VERSION 1.9.4
 
 RUN set -ex \
   && for key in \

8/stretch/Dockerfile

@@ -21,7 +21,7 @@ RUN set -ex \
     gpg --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
   done
 
-ENV NODE_VERSION 8.11.4
+ENV NODE_VERSION 8.12.0
 
 RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && case "${dpkgArch##*-}" in \
@@ -41,7 +41,7 @@ RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && rm "node-v$NODE_VERSION-linux-$ARCH.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
   && ln -s /usr/local/bin/node /usr/local/bin/nodejs
 
-ENV YARN_VERSION 1.6.0
+ENV YARN_VERSION 1.9.4
 
 RUN set -ex \
   && for key in \