Create database with separate script.

Creating the ATAT database requires a separate connection to one of the
default Postgres databases, like `postgres`. This updates the scripts
and secrets-tool command to handle creating the database. It also
removes database creation from Terraform and updates the documentation.

.dockerignore

@@ -21,11 +21,8 @@ LICENSE
 # Skip envrc
 .envrc
 
-# Skip ansible-container stuff
-ansible*
-container.yml
-meta.yml
-requirements.yml
+# Skip terraform
+terraform
 
 # Skip kubernetes and Docker config stuff
 deploy