PP-5889: bump node version from 8.12.0 to 12.13.1

* update Dockerfile base image references
* update referenced Node versions (favour fixed vs. wildcard)

.nvmrc

@@ -1,2 +1 @@
-8.12.0
-
+12.13.1

Dockerfile

@@ -1,14 +1,14 @@
-FROM alpine@sha256:ea47a59a33f41270c02c8c7764e581787cf5b734ab10d27e876e62369a864459
+FROM node@sha256:b556d8910b851c27c5c8922eeb55d94fe6dbaf878d24bf0c9a8c32ba21cd091a
 
 ### Needed to run appmetrics and pact-mock-service
 ADD sgerrand.rsa.pub /etc/apk/keys/sgerrand.rsa.pub
-RUN ["apk", "--no-cache", "add", "ca-certificates"]
+RUN ["apk", "--no-cache", "add", "ca-certificates", "python", "build-base"]
 RUN wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk && apk add --no-cache glibc-2.28-r0.apk && rm -f glibc-2.28-r0.apk
 ###
 
 RUN ["apk", "--no-cache", "upgrade"]
 
-RUN ["apk", "add", "--no-cache", "nodejs", "npm", "tini"]
+RUN ["apk", "add", "--no-cache", "tini"]
 
 ADD package.json /tmp/package.json
 ADD package-lock.json /tmp/package-lock.json

docker/build_and_test.Dockerfile

@@ -1,8 +1,10 @@
-FROM govukpay/nodejs:alpine-3.8
+FROM node@sha256:b556d8910b851c27c5c8922eeb55d94fe6dbaf878d24bf0c9a8c32ba21cd091a
 
-RUN apk update &&\
-    apk upgrade &&\
-    apk add --update bash ruby
+### Needed to run appmetrics and pact-mock-service
+ADD sgerrand.rsa.pub /etc/apk/keys/sgerrand.rsa.pub
+RUN ["apk", "--no-cache", "add", "ca-certificates", "python", "build-base", "bash", "ruby"]
+RUN wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk && apk add --no-cache glibc-2.28-r0.apk && rm -f glibc-2.28-r0.apk
+###
 
 # add package.json before source for node_module cache layer
 ADD package.json /tmp/package.json

package.json

@@ -5,7 +5,7 @@
   "private": true,
   "license": "MIT",
   "engines": {
-    "node": ">8.12.0"
+    "node": "12.13.1"
   },
   "standard": {
     "globals": [

start.js

@@ -11,6 +11,8 @@
   var fileOptions = { encoding: 'utf-8' }
   var pid
 
+  logger.info(`[process.version=${process.version}] [NODE_VERSION=${process.env.NODE_VERSION}]`)
+
   /**
    * throng is a wrapper around node cluster
    * https://github.com/hunterloftis/throng