add readme file with basic instructions

readme.md

@@ -0,0 +1,35 @@
+# Node Red App Generator - Docker Based
+
+This repo with docker and docker compose will spin up a node/node-red container for a single node red application.
+
+1. clone repo
+2.  create .cfg file from example in /apps folder
+3.  run `./make-env-file <name of your cfg file>` to make corresponding .env file   
+4.  now you can run ./start
+5. use ./logs to attach to container for viewing logs
+ 
+
+example.cfg 
+```
+#!/bin/bash
+# Custom container name,  default is <cfg filename>-nodered-app
+# Name=containername
+# Custom user, default is current user (must be in docker group)
+# USER=jim  # not needed if current host user is 1000
+# TZ=America/Los_Angles # default
+# settings will be put in <parentfolder>/node-red-app/<cfg filename>
+Parent_Folder=/data
+# "extra-host" set broker and home assistant ips on host inside container
+Broker=broker.mynetwork.net # will lookup ip using dig
+HomeAssistant=ha.kebler.net # will look up ip using dig
+# give a custom tag.  https://hub.docker.com/r/nodered/node-red/tags
+# Tag=latest-18  # this is tje default  
+Port=1881 # MUST be changed to avoid conflict with other node red app containers
+```
+
+Then set up a reverse proxy if you want to the port you set
+
+
+
+
+TODO - Make DockerFile that will load in an existing settings folder for a self contained deployment of an app.