I've pushed a docker image to my private repository, built from Postgres 11 with the Apache AGE extension 0.6.0 added, and some instructions in the readme.
https://hub.docker.com/repository/docker/joefagan/incubator-age To confirm the extension version run. postgres=# select extname, extversion from pg_extension where extname='age'; extname | extversion ---------+------------ * age | 0.6.0* (1 row)