docs: add decription and diagram

This patch adds some description and diagrams for
the overview of mangoboost bridge and solution.

Signed-off-by: Dongju Chae <dongju.chae@mangoboost.io>

Author: dongju-chae

Dockerfile

@@ -12,7 +12,7 @@ RUN go mod download
 
 # build an app
 COPY cmd/ cmd/
-#COPY pkg/ pkg/
+COPY pkg/ pkg/
 RUN go build -v -o /opi-mangoboost-bridge /app/cmd/...
 
 # second stage to reduce image size

README.md

@@ -14,20 +14,30 @@
 [![GitHub stars](https://img.shields.io/github/stars/opiproject/opi-mangoboost-bridge.svg?style=flat-square&label=github%20stars)](https://github.com/opiproject/opi-mangoboost-bridge)
 [![GitHub Contributors](https://img.shields.io/github/contributors/opiproject/opi-mangoboost-bridge.svg?style=flat-square)](https://github.com/opiproject/opi-mangoboost-bridge/graphs/contributors)
 
-This repo includes OPI Mangoboost bridge API for DPUs.
+This repo includes OPI Mangoboost bridge API for DPUs, particularly OPI storage APIs for NVMe/TCP initiator and target offloads.
+For additional information, please refer to the links below.
 
-## I Want To Contribute
+- [Mango StorageBoost - NTI](https://www.mangoboost.io/products/hardware/mango-storageboost-tm-nti)
+- [Mango StorageBoost - NTT](https://www.mangoboost.io/products/hardware/mango-storageboost-tm-ntt)
 
-This project welcomes contributions and suggestions.  We are happy to have the Community involved via submission of **Issues and Pull Requests** (with substantive content or even just fixes). We are hoping for the documents, test framework, etc. to become a community process with active engagement.  PRs can be reviewed by by any number of people, and a maintainer may accept.
+The diagram below demonstrates an example of OPI-enabled workflows for xPU-based NVMe-oF initiator and target deployments.
+Running on an xPU, the bridge translates and forwards OPI API commands to the MangoBoost SDK for service management and configuration.
+On both the initiator and target, the NVMe/TCP data path is fully offloaded to the xPU hardware without any involvement of host and SoC CPU cores.
 
-See [CONTRIBUTING](https://github.com/opiproject/opi/blob/main/CONTRIBUTING.md) and [GitHub Basic Process](https://github.com/opiproject/opi/blob/main/doc-github-rules.md) for more details.
+![opi-mangoboost-bridge system overview](doc/images/opi-mangoboost-bridge_system-overview.png "opi-mangoboost-bridge system overview")
 
 ## Getting started
 
 :exclamation: `docker-compose` is deprecated. For details, see [Migrate to Compose V2](https://docs.docker.com/compose/migrate/).
 
 Run `docker-compose up -d` or `docker compose up -d`
 
-## Diagrams
+## Usage
 
-Tbd
+TBU
+
+## I Want To Contribute
+
+This project welcomes contributions and suggestions.  We are happy to have the Community involved via submission of **Issues and Pull Requests** (with substantive content or even just fixes). We are hoping for the documents, test framework, etc. to become a community process with active engagement.  PRs can be reviewed by by any number of people, and a maintainer may accept.
+
+See [CONTRIBUTING](https://github.com/opiproject/opi/blob/main/CONTRIBUTING.md) and [GitHub Basic Process](https://github.com/opiproject/opi/blob/main/doc-github-rules.md) for more details.

cmd/main.go

@@ -16,7 +16,7 @@ import (
 	"time"
 
 	"github.com/opiproject/gospdk/spdk"
-	// fe "github.com/opiproject/opi-mangoboost-bridge/pkg/frontend"
+	fe "github.com/opiproject/opi-mangoboost-bridge/pkg/frontend"
 	"github.com/opiproject/opi-smbios-bridge/pkg/inventory"
 	"github.com/opiproject/opi-spdk-bridge/pkg/backend"
 	"github.com/opiproject/opi-spdk-bridge/pkg/middleend"
@@ -120,13 +120,13 @@ func runGrpcServer(grpcPort int, spdkAddress string, tlsFiles string, store gokv
 
 	jsonRPC := spdk.NewClient(spdkAddress)
 	// Mango StorageBoost - NTI
-	// frontendOpiMangoboostServer := fe.NewServer(jsonRPC, store)
+	frontendOpiMangoboostServer := fe.NewServer(jsonRPC, store)
 	backendOpiSpdkServer := backend.NewServer(jsonRPC, store)
 	middleendOpiMangoboostServer := middleend.NewCustomizedServer(
 		jsonRPC, store, spdk.TweakModeJoinNegLbaWithLba,
 	)
 
-	// pb.RegisterFrontendNvmeServiceServer(s, frontendOpiMangoboostServer)
+	pb.RegisterFrontendNvmeServiceServer(s, frontendOpiMangoboostServer)
 	pb.RegisterNvmeRemoteControllerServiceServer(s, backendOpiSpdkServer)
 	pb.RegisterNullVolumeServiceServer(s, backendOpiSpdkServer)
 	pb.RegisterMallocVolumeServiceServer(s, backendOpiSpdkServer)