Define a container that executes migration then exits.

resolves issue #1

Author: bugslifesolutions

Dockerfile

@@ -0,0 +1,22 @@
+# Largely based on https://github.com/reactioncommerce/docker-base/blob/trunk/images/node-dev/12.14.1-v3/Dockerfile 
+FROM node:12.14.1-alpine
+
+# hadolint ignore=DL3018
+RUN apk --no-cache --update add bash curl less shadow su-exec tini vim python2 make git
+SHELL ["/bin/bash", "-o", "pipefail", "-o", "errexit", "-u", "-c"]
+
+# Allow yarn/npm to create ./node_modules
+RUN mkdir -p /usr/local/src/app && chown node:node /usr/local/src/app
+
+# Install latest NPM
+RUN npm install -g npm@latest
+
+COPY . /usr/local/src/app
+
+WORKDIR /usr/local/src/app
+
+RUN npm install
+
+USER root
+
+ENTRYPOINT ["tini", "--", "/usr/local/src/app/scripts/entrypoint.sh"]

scripts/entrypoint.sh

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+#!/usr/bin/env bash
+
+# Please Use Google Shell Style: https://google.github.io/styleguide/shell.xml
+
+# ---- Start unofficial bash strict mode boilerplate
+# http://redsymbol.net/articles/unofficial-bash-strict-mode/
+set -o errexit  # always exit on error
+set -o errtrace # trap errors in functions as well
+set -o pipefail # don't ignore exit codes when piping output
+set -o posix    # more strict failures in subshells
+# set -x          # enable debugging
+
+IFS=$'\n\t'
+# ---- End unofficial bash strict mode boilerplate
+
+# change the app user's uid:gid to match the repo root directory's
+# uid=$(stat -c "%u" .)
+# if [[ "${uid}" == "0" ]]; then
+#   # Never run as root even if directory is owned by root.
+#   # Fall back to 1000 which we know is the app user
+#   uid=1000
+# fi
+# usermod --uid "${uid}" --non-unique "${run_user}" |& grep -v "no changes" || true
+
+# scripts_dir="$(dirname "${BASH_SOURCE[0]}")"
+
+# "${scripts_dir}/fix-volumes.sh" "${run_user}"
+
+# run_user="node"
+command=(npx migrator migrate -y)
+
+unset IFS
+# exec su-exec "${run_user}" "${command[@]}"
+exec "${command[@]}"
+exit