feat: add openresty proxy implementation

This plugin is mostly compatible with the nginx plugin, but runs the proxy within a docker container. Users do not have direct access to add custom openresty configuration at this time, but instead receive the ability to setup automatic ssl on first request via letsencrypt integration.

plugins/openresty-vhosts/help-functions

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+
+cmd-openresty-help() {
+  declare desc="help command"
+  declare CMD="$1"
+  local plugin_name="openresty"
+  local plugin_description="Manage the openresty proxy integration"
+
+  if [[ "$CMD" == "${plugin_name}:help" ]]; then
+    echo -e "Usage: dokku ${plugin_name}[:COMMAND]"
+    echo ''
+    echo "$plugin_description"
+    echo ''
+    echo 'Additional commands:'
+    fn-help-content | sort | column -c2 -t -s,
+  elif [[ $(ps -o command= $PPID) == *"--all"* ]]; then
+    fn-help-content
+  else
+    cat <<help_desc
+    $plugin_name, $plugin_description
+help_desc
+  fi
+}
+
+fn-help-content() {
+  declare desc="return help content"
+  cat <<help_content
+    openresty:report [<app>] [<flag>], Displays an openresty report for one or more apps
+    openresty:set <app> <property> (<value>), Set or clear an openresty property for an app
+    openresty:show-config <app>, Display openresty compose config
+    openresty:start, Starts the openresty server
+    openresty:stop, Stops the openresty server
+help_content
+}