update compose and README to not forget where i left

Signed-off-by: Basil Bruhn <basil.bruhn@psi.ch>

.env.example

@@ -1,6 +1,6 @@
 # Optional nonsecret Compose setting; this is also the default when unset.
 # Puppet/Hiera owns the deployed .env. Do not replace it with this example:
-# SAP/BANF and other applications still use its existing settings.
-# Migrated application credentials live in the nine service env files listed
+# Other applications and rollback still use its existing settings.
+# Migrated application credentials live in the eleven service env files listed
 # in README.md and are read with format: raw.
 WEBHOSTING_ENV_DIR=/etc/webhosting