create dict in one pass rather than two

odoo_scripts/docker_postgresql.py

@@ -79,9 +79,6 @@
             for mount_dict in container.attrs["Mounts"]:
                 if mount_dict["Destination"] == "/var/run/postgresql":
                     source = mount_dict["Source"]
-    volumes = {}
-
-    volumes[pg_data_volume_name] = {
                     break
     if source:
         return container, lambda: stop_postgresql(container), source
@@ -85,6 +82,9 @@
                     break
     if source:
         return container, lambda: stop_postgresql(container), source
-        "bind": "/var/lib/postgresql/data",
-        "mode": "rw",
+    volumes = {
+        pg_data_volume_name: {
+            "bind": "/var/lib/postgresql/data",
+            "mode": "rw",
+        }
     }
@@ -90,4 +90,5 @@
     }
+
     port_bindings = {}
     if host_pg_port:
         port_bindings[5432] = host_pg_port