Update and rename installing-contributor-extensions-postgres.md to postgres-additional-modules.md
adds reference style links
grammar fixes
add section about RDS
DELETE
quay-enterprise/installing-contributor-extensions-postgres.md
-# Installing Contributor Extensions for Postgres
-
-As of release 2.1.0 Quay Enterprise requires the [pg_trgm](https://www.postgresql.org/docs/current/static/pgtrgm.html) extension when using Postgres. This extension ships as part of the [Additional Supplied Modules](https://www.postgresql.org/docs/current/static/contrib.html). The requirements to allow extensions to be installed can be satisfied via package management tools on Debian and RedHat-based systems.
-
-## Debian/Ubuntu
-
-```
-# apt-get update
-# apt-get install postgresql-contrib -y
-```
-
-## Redhat/CentOS
-
-```
-# yum install postgresql-contrib
-```
-## Fedora
-
-```
-# dnf install postgresql-contrib
-```
-
-## Docker
-The [library/postgres](https://hub.docker.com/_/postgres/) container includes `postgresql-contrib` package by default.
-
-If using a container based on an OS above simply modify the Dockerfile to install `postgresql-contrib` package. If using an OS base that is not listed in may be required install `contrib` from [source](https://www.postgresql.org/docs/current/static/contrib.html).

ADD
quay-enterprise/postgres-additional-modules.md
+# Installing Contributor Extensions for Postgres
+
+As of release 2.1.0, Quay Enterprise requires the [pg_trgm][pg_trm] extension when using PostgreSQL. This extension is part of the [Additional Supplied Modules][Additional Supplied Modules]. These modules can be installed with standard package management tools on Debian and RedHat-based systems.
+
+## Debian/Ubuntu
+
+```
+# apt-get update
+# apt-get install postgresql-contrib
+```
+
+## Redhat/CentOS
+
+```
+# yum install postgresql-contrib
+```
+## Fedora
+
+```
+# dnf install postgresql-contrib
+```
+
+## Docker
+The [library/postgres][library/postgres] container includes the `postgresql-contrib` package.
+
+If using a container based on one of the above operating systems, modify the container's Dockerfile to install the postgresql-contrib package. Containers built FROM other operating systems may need to [install the additional modules from source][source].
+
+## PostgreSQL on Amazon RDS
+
+The `postgresql-contrib package` is included.
+
+[pg_trm]: https://www.postgresql.org/docs/current/static/pgtrgm.html
+[Additional Supplied Modules]: https://www.postgresql.org/docs/current/static/contrib.html
+[library/postgres]: https://hub.docker.com/_/postgres/
+[source]: https://www.postgresql.org/docs/current/static/contrib.html

Update and rename installing-contributor-extensions-postgres.md to postgres-additional-modules.md

adds reference style links
grammar fixes
add section about RDS