allow users to pass arguments to `nginx`

bitnami/nginx/rootfs/entrypoint.sh

@@ -1,6 +1,10 @@
 #!/bin/bash
 
-if [ "${1}" == "nginx" -o "${1}" == "$(which nginx)" ]; then
+if [ "${1:0:1}" = '-' ]; then
+  export EXTRA_OPTIONS="$@"
+  set --
+elif [ "${1}" == "nginx" -o "${1}" == "$(which nginx)" ]; then
+  export EXTRA_OPTIONS="${@:2}"
   set --
 fi
 

bitnami/nginx/rootfs/etc/services.d/nginx/run

@@ -1,4 +1,4 @@
 #!/usr/bin/with-contenv bash
 set -e
 source $BITNAMI_PREFIX/bitnami-utils.sh
-exec nginx -g "daemon off;"
+exec nginx -g "daemon off;" ${EXTRA_OPTIONS:+"$EXTRA_OPTIONS"}