Add Dockerfiles and Docker instructions

[Vidminas]

The main https://github.com/CommunitySolidServer/CommunitySolidServer repo has instructions for running with Docker. To make integrating the recipes easier into existing Docker workflows, I've added a minimal Dockerfile for each of the extensions and instructions how to use them.

I've only recently started using Docker, so a review of the Dockerfiles by someone with more experience might be helpful

[joachimvh]

Assigning @Falx to this as he handles everything docker related in the CSS repo. The docker files are missing a trailing newline though.

[Falx]

I don't think the Dockerfiles of the CSS were specifically designed to be used as a base to build plugins on top of in a new Dockerfile. Instead I would use a simplified approach to build from scratch (as you essentially also do when building in nodejs):

# Build stage
FROM node:lts-alpine

# Set current working directory
WORKDIR /community-server

# Copy the package.json and package-lock.json files and any required docker context files (like a src folder)
COPY package*.json .

# Container config & data dir for volume sharing
# Defaults to filestorage with /data directory (passed through CMD below)
RUN mkdir /config /data
# Copy all config files to /config
COPY config* /config

# Install and build the Solid community server
RUN npm ci --unsafe-perm --omit=dev

# Remove src folder if present (not needed in container once built)
RUN rm -rf /community-server/src

# Informs Docker that the container listens on the specified network port at runtime
EXPOSE 3000

# Set command run by the container
ENTRYPOINT [ "npx", "community-solid-server", "-c", "/config/config-penny.json" ]

# By default run in filemode (overriden if passing alternative arguments or env vars)
ENV CSS_CONFIG=/config/config-penny.json
ENV CSS_ROOT_FILE_PATH=/data

This can be built in the penny folder docker build -t mypennyexample:latest . and then be used to run with docker run --rm --name test -p 3000:3000 -v C:\Users\user\mydata:/data -it mypennyexample:latest.