Fixes and Enhancements (#16)

* Add more instructions after successfully creating a new subdomain.

* Update the container name.

* Add a just-in-case step.

* Add an alias and improve comments.

* Fix manage path.

* Add limits but no reservations for PP. Start off somewhat relaxed rather than strict.

* Always restart PP containers.

* Move URL to env file. Do not recommend using HTTPS in the value.

* Format comments.

* Put commands in shells so they cannot exit the full program.

* Updating apps like this did not seem to be working, but also do not want it to work anymore.

Config/PhotoPrism/env.example

@@ -7,6 +7,12 @@
 PHOTOPRISM_ADMIN_USER = "admin"                 # admin login username
 PHOTOPRISM_ADMIN_PASSWORD = "PleaseChangeMe"    # initial admin password (8-72 characters)
 
+# External FQDN
+#  Should be in the format "http(s)://domain.name(:port)/(path)".
+#  Seems to work best if you leave off the s if behind a revese proxy,
+#   such as: PHOTOPRISM_SITE_URL = "http://photoprism.example.com"
+PHOTOPRISM_SITE_URL = "http://localhost:2342"
+
 # Max Storage Space?
 PHOTOPRISM_ORIGINALS_LIMIT = 5000               # file size limit for originals in MB (increase for high-res video)