Add Docker example

docker/Dockerfile

@@ -0,0 +1,17 @@
+# syntax=docker/dockerfile:1.4.2
+
+FROM ubuntu:20.04
+
+## Install requirements
+
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC \
+                      apt-get install -y \
+                                      nodejs \
+                                      npm
+
+## Install ro-crate-html-js
+RUN npm install ro-crate-html-js
+ENV PATH "/node_modules/.bin:$PATH"
+
+## Create directory for output
+RUN mkdir /tmp/output

docker/build.sh

@@ -0,0 +1 @@
+sudo docker build -t rocrate-preview .

docker/create-and-run.md

@@ -0,0 +1,31 @@
+# Create and run a Docker container
+
+## Create a Dockerfile
+
+Create a `Dockerfile` which starts with a base docker image e.g. Ubuntu.
+
+In this file, you install the software you need, set environment variables, create directories etc.
+
+[Example](Dockerfile).
+
+## Build the container
+
+Use the command `docker build -t` to create a container and tag it with a name.
+
+Docker is looking for a file called `Dockerfile` in the specified directory.
+
+[Example](build.sh)
+
+## Run the container
+
+Use `docker run` to run the container. 
+
+`-w` sets the working directory in the container's file system.
+
+`-v` mounts a volume (directory or file), which is like a mapped network drive. The docker container has read/write access to this directory on the host machine.
+
+The `docker run` command includes the commands you want to run in the container.
+
+[ Example](run.sh)
+
+You can also run a container [interactively](interactive.sh).

docker/interactive.sh

@@ -0,0 +1,6 @@
+# sudo docker run -it rocrate-preview:latest
+sudo docker run -v /home/mbexegc2/projects/esciencelab/rocrate-to-pages/ro-crate-metadata.json:/tmp/ro-crate-metadata.json \
+    -w /tmp \
+    -it \
+    rocrate-preview:latest
+

docker/run.sh

@@ -0,0 +1,5 @@
+sudo docker run -v /home/mbexegc2/projects/esciencelab/rocrate-to-pages/ro-crate-metadata.json:/tmp/ro-crate-metadata.json \
+  -w /tmp \
+  -v /home/mbexegc2/projects/esciencelab/docker/output:/tmp/output \
+  rocrate-preview:latest \
+  bash -c $'rochtml ro-crate-metadata.json; mv ro-crate-preview.html /tmp/output'