Remove postgres dep not needed in production

infra/copycat-db/Dockerfile

@@ -3,17 +3,6 @@ FROM ubuntu:latest
 RUN apt-get update && apt-get install -y curl gnupg
 RUN apt-get install -y tini
 
-# Install pg_dump (via Postgres client)
-# https://www.postgresql.org/download/linux/ubuntu/
-#
-# We don't need it for production backups, but this is useful for local testing.
-RUN \
-    apt-get install -y lsb-release && \
-    sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list' && \
-    curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
-    apt-get update && \
-    apt-get -y install postgresql-client-12
-
 # Install SCW CLI
 # Latest release: https://github.com/scaleway/scaleway-cli/releases/latest
 RUN \

infra/copycat-db/src/backup.sh

@@ -18,10 +18,9 @@ EXPIRY="$(date -Iseconds --utc --date "@$EXPIRYS")"
 
 if test -z "$SCW_RDB_INSTANCE_ID"
 then
-    # A required SCW related environment variable hasn't been specified. This is
-    # expected when running the script locally for testing. Fallback to using
-    # pg_dump for creating the backup.
-    pg_dump -Fc ente_db > $BACKUP_FILE
+    # A required SCW related environment variable hasn't been specified.
+    echo "Missing SCW_RDB_INSTANCE_ID"
+    exit 1
 else
     # We need to export a backup first after creating it, before it can be
     # downloaded.