roles: Set caddy and docker dependency chain

Each role (with outward-facing ingress needs) depends on caddy since
they depend on the availability of the 'caddy' network which is set in
that role.

Caddy in turn depends on docker.

roles/arr/meta/main.yaml

@@ -21,6 +21,5 @@ galaxy_info:
     # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
     #       Maximum 20 tags per role.
 
-dependencies: []
-  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
-  # if you add dependencies to this list.
+dependencies:
+  - caddy

roles/grocy/meta/main.yaml

@@ -29,6 +29,5 @@ galaxy_info:
     # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
     #       Maximum 20 tags per role.
 
-dependencies: []
-  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
-  # if you add dependencies to this list.
+dependencies:
+  - caddy

roles/paperless/meta/main.yaml

@@ -29,6 +29,5 @@ galaxy_info:
     # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
     #       Maximum 20 tags per role.
 
-dependencies: []
-  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
-  # if you add dependencies to this list.
+dependencies:
+  - caddy