postgres client instead of server

infrastrucure/docker/image/Dockerfile

@@ -20,7 +20,7 @@ RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-k
 RUN apt-get update
 # Install the latest version of PostgreSQL.
 # If you want a specific version, use 'postgresql-12' or similar instead of 'postgresql':
-RUN apt-get -y install postgresql
+RUN apt-get -y install postgresql-client-12
 
 
 # Prepare Entrypoint Script

infrastrucure/docker/test/serverspec.edn

@@ -1 +1,2 @@
-{:package [{:name "restic"}]}
+{:package [{:name "restic"}
+           {:name "postgresql-client-12"}]}