couchdb: set single_node=true

to remove the need to check if the _users database was created

couchdb/Dockerfile.couchdb

@@ -1,14 +1,5 @@
 FROM couchdb:3.4.2
 
-COPY docker-custom-entrypoint.sh /usr/local/bin/docker-custom-entrypoint.sh
-COPY init_users_db.sh /usr/local/bin/init_users_db.sh
+COPY local.ini /opt/couchdb/etc/local.d/local.ini
 
-ENTRYPOINT ["tini", "--", "/usr/local/bin/docker-custom-entrypoint.sh"]
-
-EXPOSE 5984
-
-# Copied from the couchdb image Dockerfile
-# https://github.com/apache/couchdb-docker/blob/734c61f/3.4.2/Dockerfile#L104
-# as it would have been otherwise reset to an empty string
-# See https://docs.docker.com/reference/dockerfile/#understand-how-cmd-and-entrypoint-interact
-CMD ["/opt/couchdb/bin/couchdb"]
+# Inherit ENTRYPOINT and CMD from couchdb image