Add Dockerfile and Docker install instructions

.dockerignore

@@ -0,0 +1,18 @@
+.circleci
+example
+node_modules
+test
+.ava.json
+.babelrc
+.dockerignore
+.git
+.gitattributes
+.gitignore
+.npmignore
+*.code-workspace
+*.tgz
+ava.config.js
+CHANGELOG.md
+Dockerfile
+npm-debug.log
+STYLE.md

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Dockerfile and installation instructions on how to use Docker image from DockerHub.
 
 ## [0.1.2] - 2019-03-28
 ### Fixed

Dockerfile

@@ -0,0 +1,10 @@
+FROM node:11-alpine
+
+RUN mkdir -p /home/node/postman-to-k6/node_modules && chown -R node:node /home/node/postman-to-k6
+WORKDIR /home/node/postman-to-k6
+COPY package*.json ./
+USER node
+COPY --chown=node:node . .
+RUN npm install --production
+
+ENTRYPOINT ["node", "bin/postman-to-k6.js"]

README.md

@@ -20,7 +20,7 @@ Supported Features:
 
 **Install**:
 
-![npm](https://img.shields.io/npm/v/postman-to-k6.svg) ![npm](https://img.shields.io/npm/dw/postman-to-k6.svg)
+![npm](https://img.shields.io/npm/v/postman-to-k6.svg) ![npm](https://img.shields.io/npm/dw/postman-to-k6.svg) ![dockerhub](https://img.shields.io/docker/pulls/loadimpact/postman-to-k6.svg)
 
 Globally, and preferably using [nvm](https://github.com/creationix/nvm) (at least on Unix/Linux systems to avoid filesystem permission issues when using sudo):
 ```shell
@@ -34,6 +34,11 @@ npm install postman-to-k6
 
 Note that this will require you to run the converter with `node node_modules/postman-to-k6/bin/postman-to-k6.js ...`.
 
+Alternatively, you can install the tool from DockerHub:
+```shell
+docker pull loadimpact/postman-to-k6
+```
+
 **Convert**:
 
 Pass a collection export to convert.
@@ -67,6 +72,15 @@ Or a data file in JSON format.
 postman-to-k6 collection.json --json data.json -o k6-script.js
 ```
 
+Using the Docker image, you execute the tool as follows:
+```shell
+docker run -it -v "/path/to/postman/collection/:/postman/" loadimpact/postman-to-k6 /postman/MyCollection.postman_collection.json -o /postman/test.js
+```
+and then execute the k6 test using:
+```shell
+k6 run /path/to/postman/collection/test.js
+```
+
 ## Examples
 
 A collection of Postman examples are located under `example`.