Update container argument_specs, add alpine role as a template

roles/alpine/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+
+- name: Alpine container
+  import_role:
+    name: container
+  vars:
+    docker_service: alpine
+    docker_image: alpine
+    docker_image_http_port: 8080
+    docker_database: postgres
+    docker_mounts:
+      - name: data
+        path: /data
+    docker_env:
+      TZ: "{{ timezone }}"