anchor.diff:  * `Single-Tier`: To help you to quickly get started, the single-tier deployment offers an AMI that provides everything you need and can be launched with a **one-click** button. In this option the Kill Bill server, KAUI and a MariaDB (MySQL) database run on one single node. This is very convenient and inexpensive to get started, but is not recommended for production deployments.
   * `Multi-Tier`: In this mode, there is also a single AMI for both Kill Bill server and KAUI, but the deployment will use more than one node (typically two). This option requires a bit more setup and depends on an external database. The use of multiple nodes is intended to provide redundancy and to eliminate downtime during upgrades.
   
  -The Single AMI Deployments are a great way to easily get started, but they are often not the best choices for production deployments. Please refer to https://docs.killbill.io/latest/aws-single-ami.html[Installation via Single AMI] for further information.
  +The Single AMI Deployments are a great way to easily get started, but they are often not the best choices for production deployments. Please refer to https://docs.killbill.io/latest/aws-singletier.html[Installation: Single Tier] or https://docs.killbill.io/latest/aws-multitier.html[Installation: Multi-Tier] for further information.
   
   **Cloud Formation Deployments** use AWS CloudFormation to provide a better integration with the rest of the AWS ecosystem. These deployments include separate AMIs for the Kill Bill Server and for Kaui, and rely on auto-scaling groups to scale both Kill Bill and KAUI instances independently. They make use of the Amazon Aurora RDS database, a version of MySQL that is also PostgreSQL compatible. They also make use of CloudWatch for metrics.
   Cloud Formation Deployments also offer a **one-click** button deployment for the whole stack, including the required database. They are a good option to set up a production-ready deployment with minimum efforts. Please refer to https://docs.killbill.io/latest/aws-cf.html[Installation via Cloud Formation] for further information.
  
positive.code:           <h5 class="card-title">Multi-Tier single AMI with external database</h5>
            <p class="card-text">Fully customizable production environment (advanced users)</p>
            <a href="https://aws.amazon.com/marketplace/pp/B083LYVG9H?ref=_ptnr_doclanding_" onclick="getOutboundLink('https://aws.amazon.com/marketplace/pp/B083LYVG9H?ref=_ptnr_doclanding_'); return false;" class="btn btn-primary">Launch</a>
            <p class="card-text"><a href="https://docs.killbill.io/latest/aws-single-ami.html">Docs</a></p>
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negative.code:           <h5 class="card-title">Single-Tier single AMI with MariaDB</h5>
            <p class="card-text">Perfect for prototyping and test environments</p>
            <a href="https://aws.amazon.com/marketplace/pp/B083LYVG9H?ref=_ptnr_doclanding_" onclick="getOutboundLink('https://aws.amazon.com/marketplace/pp/B083LYVG9H?ref=_ptnr_doclanding_'); return false;" class="btn btn-primary">Launch</a>
            <p class="card-text"><a href="https://docs.killbill.io/latest/aws-singletier.html">Docs</a></p>
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