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This repository stores the example source code and presentation source code for a presentation with the above title, to be given on September 6, 2018 at the React NYC Meetup.

This talk will highlight some patterns to help the development environment mirror the production environment by using containers and a reverse proxy image to manage local traffic on a single localhost port. In order to maintain a usable and flexible development environment, this talk will also highlight how to incorporate webpack 4, webpack-serve, and hot module replacement in this environment.

The presentation is built with hovercraft, and relies on plantuml for diagrams.

This example highlights the CORS issues found when working with traditional web applications; configuring CORS may be the answer, if multiple origins are the intended setup. Alternatively, create-react-app has a built-in proxy feature.

This example has been built and tested on a Linux Mint machine, as well as on Mac OSX High Sierra. It's likely that this example should also work on Windows with similar Docker and docker-compose versions.

Prerequisites

• Install Docker CE and compose
• On Mac, install Docker for Mac (edge), which includes both.

On both platforms, these were the tested versions:

docker --version
Docker version 18.06.1-ce, build e68fc7a
docker-compose --version
docker-compose version 1.22.0, build f46880f

This should provide a feasible hot-reloaded front-end development environment under the app/ directory.

cd working-example
docker-compose build
docker-compose up

... in another shell session (you only have to do this the first time you build)

cd working-example

# Run a bash session within the api container
docker-compose exec api bash

# ... while in the container itself
./node_modules/.bin/sequelize db:migrate
# ... exit the container & bash session

With the database created, the app should be loadable in the browser at http://localhost/app. Any changes made to the database should now be persisted under api_db/postgres/local_data, which means that the containers can be created and destroyed at will.

E.g.:

# Remove all containers & volumes
docker-compose rm -v
# ... say Y

# then create & run the containers again
docker-compose up

If you want to clean up docker containers/images/volumes in one command, look into docker-compose down --help.