docker alpine for nodered

FROM mhart/alpine-node:latest
# https://github.com/mhart/alpine-node

LABEL version="1.0" \
      description="A Node-RED image for IoTPlay's Edge, only NodeRed, no DB's" \
      maintainer="Jéan Roux <jean@iotplay.org>"

RUN   apk update && \
      apk add --no-cache \
      git \
      openssh-keygen
      # rm -rf /var/cache/apk/*

# Home directory for Node-RED application source code.
RUN mkdir -p /usr/src/node-red

# User data directory, contains flows, config and nodes.
RUN mkdir /data

WORKDIR /usr/src/node-red

# Add node-red user so we aren't running as root.
# Alpine does not have useradd, thus use addgroup, and adduser

RUN addgroup -S node-red && adduser -S -g node-red node-red && \
chown -R node-red:node-red /usr/src/node-red

#--- From the Jessie version----
# RUN useradd --home-dir /usr/src/node-red --no-create-home node-red \
#    && chown -R node-red:node-red /data \
#    && chown -R node-red:node-red /usr/src/node-red
#--- From the Jessie version----

USER node-red

# package.json contains Node-RED NPM module and node dependencies
COPY package.json /usr/src/node-red/
RUN npm install

# User configuration directory volume
EXPOSE 1880

# Environment variable holding file path for flows configuration
ENV FLOWS=flows.json

CMD ["npm", "start", "--", "--userDir", "/data"]