Fix copy/pasta error

entrypoint.sh.tmpl

@@ -3,6 +3,8 @@
 set -eu
 
 file_env() {
+  # 3wc: Load $VAR_FILE into $VAR - useful for secrets. See
+  #   https://medium.com/@adrian.gheorghe.dev/using-docker-secrets-in-your-environment-variables-7a0609659aab
   local var="$1"
   local fileVar="${var}_FILE"
   local def="${2:-}"
@@ -11,13 +13,12 @@ file_env() {
     echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
     exit 1
   fi
-
   local val="$def"
   if [ "${!var:-}" ]; then
-    val="${!var}" elif [ "${!fileVar:-}" ]; then
+    val="${!var}"
+  elif [ "${!fileVar:-}" ]; then
     val="$(< "${!fileVar}")"
   fi
-
   export "$var"="$val"
   unset "$fileVar"
 }