docs(guides): add getting started document

docs/GETTING_STARTED.MD

@@ -0,0 +1,72 @@
+# Getting Started
+
+## Dependencies
+
+---
+
+You'll need to have in your Mac the following dependencies installed, if you don't want to use the provided Docker containers.
+
+* Ruby `2.4.5`
+* Rails `5.0.7.1`
+* Node `11.12.0`
+
+## Local Config
+
+---
+
+Instructions for running Development environment using macOS Catalina
+
+### Initial steps
+*Dependencies:*
+
+Have a ruby version installed, you can learn more about how to use multiple versions of Ruby installed in your computer with [rbenv](https://github.com/rbenv/rbenv) or [rvm](https://rvm.io).
+
+An instance of PostgresSQL running.
+
+*Setting up secrets:*
+
+Run `cp .env.template .env` to copy the provided template file for env variables to create your own.
+
+You'll need to provide a `DEVISE_SECRET_KEY` and `SECRET_TOKEN` which you can obtain by running `bundle exec rake secret`.
+
+Set the following secrets in your `.env` file with your *Stripe account* information.
+
+* `STRIPE_API_KEY` with your Stripe *private* key.
+* `STRIPE_API_PUBLIC` with your Stripe *public* key.
+
+The last secrets you'll need are related to AWS. You can learn how to [create an S3 Bucket](https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html) within the AWS Documentation, and to obtain your access and secret key, you can [learn more here](https://aws.amazon.com/blogs/security/wheres-my-secret-access-key/).
+
+* `S3_BUCKET_NAME`
+* `AWS_ACCESS_KEY`
+* `AWS_SECRET_ACCESS_KEY`
+
+*Setting up the local database:*
+
+Run `rake db:setup` to run all the db tasks within one command. This will create the dbs for each environment, load the `structure.sql`, run pending migrations and will also run the seed functionality.
+
+### How to run
+You'll need 2 consoles to run the project. One for the rails env and another one to run the asset pipeline through [webpack](https://webpack.js.org) , since it's *not incorporated yet* into the rails asset pipeline.
+
+```bash
+# Console one (1)
+bundle exec rails server
+```
+
+```bash
+# Console two (2)
+npm run watch
+# #### Notes ####
+# If you get errors from running this command.
+# You'll need to manually run the following commands.
+npm run export-button-config
+npm run export-i18n
+npm run generate-api-js
+# Now we're able to watch!
+npx webpack --watch
+```
+
+## Testing
+
+---
+
+Run `bundle exec rspec` to run test suite.