added preliminary sections to design doc

Author: KavinKrishnan

guidelines/MONAI-app-package-builder.md

@@ -0,0 +1,72 @@
+# MONAI Application Package Builder
+
+## Description
+
+This is a proposal for the MONAI Deploy Working Group.
+
+- [Overview](#overview)
+  - [Goal](#goal)
+- [Requirements](#requirements)
+  - [Creates Deployable Single Container](#creates-deployable-single-container)
+  - [Packages Required MAP Components](#packages-required-map-components)
+  - [Offers Intuitive Interface](#offers-intuitive-interface)
+  - [Input Requirements](#input-requirements)
+  - [Converting Existing Images](#converting-existing-images)
+- [Architecture & Design](#architecture--design)
+  - [Builder Specification](#builder-specification)
+    - [Building MAP with MONAI Application](#building-map-with-monai-application)
+    - [Building MAP from existing container](#building-map-from-existing-container)
+
+## Overview
+Data scientists and application developers will require a utility to package their MONAI applications into deployable MONAI Application Packages (MAP). This proposal documents the specification of the initial version of the MONAI Application Package Builder (Builder).
+
+### Goal
+
+The goal of this proposal is to achieve clarity on the initial  structure of the Builder, with regards specifically to how it should create a deployable package and the interface it should provide to users.
+
+##  Requirements
+
+The following are requirements which need to be met by the MAP Builder specification to be considered complete and approved.
+
+### Creates Deployable Single Container
+
+Builder SHALL produce a functional MAP which SHALL be a deployable single containerized application
+
+### Packages Required MAP Components
+
+Builder SHALL package/provide all required components specified in [MONAI Application Package](./monai-application-package.md). 
+
+### Offers Intuitive Interface
+
+Builder SHOULD provide users with an intuitive interface to package an application into a MAP.
+
+Builder SHOULD provide a command-line interface for users to package an application into a MAP.
+
+### Input Requirements
+
+Users SHALL provide the Builder a MONAI application along with any optional pre-trained models to be packaged into a MAP. 
+
+### Converting Existing Images
+
+Builder SHALL support converting existing container images into MAPs
+
+## Architecture & Design
+
+Builder SHALL accept a user supplied application and package it into a MAP
+
+[!IMPORTANT]
+The full design and layout for a MAP produced by Builder can be found in the [MONAI Application Package](./monai-application-package.md) design document.
+
+### Builder Specification
+
+Builder SHALL adhere to the MAP specification when building a MAP
+
+Builder SHALL be a client that supports the following features
+
+#### Building MAP with MONAI Application
+
+Builder SHALL support building a MAP with a user supplied MONAI application and any optional pre-trained models
+
+#### Building MAP from existing container
+
+Builder SHALL support building a MAP from an existing container