use ansible-vault for aws credentials (replaces prod.env)

deploy/roles/galion_monitor/tasks/main.yml

@@ -14,3 +14,9 @@
   pip:
     name: galion-modbus-exporter
     state: present
+
+- name: Configure AWS credentials from vault
+  template:
+    src: aws_credentials.j2
+    dest: /home/galion/.aws/credentials
+    mode: '0600'