AWS account infra

Initial infra structure for a fresh AWS account.

Prerequisites

The AWS account you want to deploy this service on is bootstrapped: https://docs.aws.amazon.com/cdk/v2/guide/bootstrapping.html
Docker should be installed on the development machine https://docs.docker.com/get-docker/.
The aws CLI should be installed on the development machine (https://formulae.brew.sh/formula/awscli).
The machine you're running this on should be able to authenticate with AWS. See https://docs.aws.amazon.com/cdk/v2/guide/getting_started.html#getting_started_auth. ATTOW this means setting up a user using AWS Identity Center and running

  aws configure sso

aws sso login --profile <aws-profile>

Install dependencies
```
npm i
```
Deploy the stack
```
DOMAIN=<your-domain> BUDGET_NOTIFICATION_EMAILS=<comma-separated-list-of-emails> npm run deploy -- --profile <aws-profile>
```
The DOMAIN and BUDGET_NOTIFICATION_EMAILS environment variables are both optional. There presence controls wether the related stack will be deployed or not.
If the DOMAIN environment is set and thus the domains-stack is deploying for the first time, you will have to point the DNS of your domain to the Name Servers of the Hosted Zone that is being created by this stack. This so the certificate created by ACM can be verified while deploying.