How to build a Ruby-On-Rails and React app from scratch

Create a repo in Github
Install last version of ruby:
```
rbenv install 3.0.0
rbenv global 3.0.0
```
Install last version of node.js: nvm is equivalent to rbenv: allow to manage several versions of node.js on the same computer. Versions are set on a per-project basis.
```
nvm install node
nvm alias default node
nvm use
node --version
```
Install rails
```
gem install rails
```

Bootstrap a new app.

rails new my-app \
 --database=postgresql \
 --api \

Set the NodeJS version in our new app.
```
cd my-app
echo "15.8.0" > .nvmrc
```
Let’s check the used ruby version.
```
cat .ruby-version
```

Push to Github

git remote add origin git@github.com:<USER>/<REPO>.git
git commit -m "first commit"

Test run the app
```
bundle exec rails s
```

I want to use PostgreSQL and avoid manually installing the database by using Docker-Compose. Create and configure Docker:

version: "3.7"
services:
  database:
    image: "postgres" # use latest official postgres version
    ports:
      - "127.0.0.1:5432:5432"
    environment:
      POSTGRES_USER: ${USER}
      POSTGRES_HOST_AUTH_METHOD: "trust"
    volumes:
      - ${PWD}/db:${PWD}/db # persist data even if container shuts downvolumes:
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "${USER}"]
    container_name: quiz_postgres

Install postgresql and disable it.

sudo apt install postgresql
sudo systemctl disable postgresql
sudo systemctl stop postgresql

Launch docker and connect to the DB:

docker-compose up -d
psql -h 127.0.0.1 -U <USER> # Connect to the DB directly
docker-compose run database bash # Or connect inside the docker container...
psql -h database -U <USER> # ...and then to the DB

Next time you want to start or stop docker, don’t do up but instead do:
```
docker-compose stop
docker-compose start
```
Edit database.yml:

default: &default
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

development:
  <<: *default
  url: <%= "postgres://#{ENV['USER']}:@localhost:5432/quiz-development" %>

test:
  <<: *default
  url: <%= "postgres://#{ENV['USER']}:@localhost:5432/quiz-test" %>

Start rails and create a db:

bundle exec rails db:create
bundle exec rails db:migrate
bundle exec rails s