install_deps.sh installs ansible requirements

install_deps.sh

@@ -1,2 +1,3 @@
 #!/usr/bin/env bash
 sudo apt-get -y install virtualbox vagrant ansible
+ansible-galaxy install -r ./requirements.yml

requirements.yml

@@ -0,0 +1,4 @@
+---
+# ansible-galaxy requirements for this repository
+collections:
+  - 'community.postgresql'