How to create a Docker Image for Keystone 5

[jesstelford]

Part of "Keystone 5 deployment strategies" #1257

WIP Notes:

An example Dockerfile for an older version of Keystone 5:

FROM node:10.9.0-alpine

LABEL name "my-ks-app"

RUN mkdir /app
WORKDIR /app
COPY ./ /app

# We need some other deps before we install. Then we need to clean them up afer.
# See https://github.com/nodejs/docker-node/issues/384#issuecomment-305208112
# And https://github.com/npm/uid-number/issues/3#issuecomment-287413039
RUN apk --no-cache add --virtual native-deps g++ gcc libgcc libstdc++ linux-headers make python && \
  npm config set unsafe-perm true && \
  npm install --quiet node-gyp -g && \
  yarn && \
  apk del native-deps

EXPOSE 60000
CMD ["yarn", "start"]

[sarneaud]

We have some docs now with https://github.com/keystonejs/keystone-5/pull/1682