Add post install instructions #11659

Job	Run time
test (apache2)	13s
test (approvals)	13s
test (bibdata)	13s
test (bibdata_sqs_poller)	14s
test (bind9)	19s
test (blacklight_app)	39s
test (byzantine)	52s
test (cantaloupe)	13s
test (capistrano)	18s
test (common)	16s
test (composer)	22s
test (datadog)	20s
test (deploy_user)	13s
test (dpul)	14s
test (drupal10)	13s
test (drush)	20s
test (ealapps)	19s
test (extra_path)	19s
test (ezproxy)	27s
test (ffmpeg)	17s
test (figgy)	31s
test (figgy_filewatcher_worker)	13s
test (figgy_pubsub_worker)	15s
test (fits)	14s
test (freetds)	13s
test (geaccirc)	13s
test (gitlab)	3m 36s
test (hr_share)	18s
test (imagemagick)	13s
test (kakadu)	18s
test (lae)	18s
test (lib_jobs)	17s
test (lib_svn)	13s
test (libwww)	16s
test (lockers_and_study_spaces)	14s
test (mailcatcher)	13s
test (mediainfo)	18s
test (memcached)	19s
test (mflux)	21s
test (mysql)	18s
test (nfsserver)	14s
test (nginx)	19s
test (nginxplus)	13s
test (nodejs)	14s
test (oawaiver)	13s
test (ojs)	14s
test (orangelight)	15s
test (passenger)	16s
test (php)	14s
test (postfix)	1m 40s
test (postgresql)	14s
test (pul_nomad)	13s
test (pulmap)	18s
test (rails_app)	12s
test (redis)	15s
test (researchdata)	13s
test (ruby_s)	18s
test (samba)	15s
test (shared_data)	17s
test (sidekiq_worker)	19s
test (simple_annotation)	20s
test (sneakers_worker)	15s
test (special_collections)	14s
test (subversion)	21s
test (svn)	19s
test (timezone)	19s
test (tippecanoe)	21s
test (towerdeploy)	13s
test (video_reserves)	18s
test (vips)	18s
	24m 49s

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