Break out into global part of script

entrypoint.sh.tmpl

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Modified version of https://github.com/foodcoops/foodsoft/blob/master/docker-entrypoint.sh
+set -eu
 
 file_env() {
   local var="$1"
@@ -37,13 +37,7 @@ db_setup() {
   rake db:setup
 }
 
-main() {
-  set -eu
-
-  reuse
-  load_vars
-  db_setup
-  exec "$@"
-}
-
-main
+reuse
+load_vars
+db_setup
+exec "$@"