chore: update readme

README.md

 <h1 align="center">✍️ Memos</h1>
 
+<p align="center">An open source, quickly self-hosted alternative to flomo</p>
+
 <p align="center">
-  <a href="https://memos.onrender.com/">Live Demo</a> •
-  <a href="https://github.com/justmemos/memos/discussions">Discussions</a>
+  <img alt="GitHub stars" src="https://img.shields.io/github/stars/justmemos/memos" />
+  <img alt="Docker pull" src="https://img.shields.io/docker/pulls/neosmemo/memos.svg" />
+  <img alt="Go report" src="https://goreportcard.com/badge/github.com/justmemos/memos" />
 </p>
 
 <p align="center">
-  <img alt="GitHub stars" src="https://img.shields.io/github/stars/justmemos/memos" />
-  <img alt="GitHub forks" src="https://img.shields.io/github/forks/justmemos/memos" />
-  <img alt="GitHub Watchers" src="https://img.shields.io/github/watchers/justmemos/memos" />
+  <a href="https://memos.onrender.com/">Live Demo</a> •
+  <a href="https://github.com/justmemos/memos/discussions">Discussions</a>
 </p>
 
 ![demo](https://raw.githubusercontent.com/justmemos/memos/main/resources/demo.png)
 
-Memos is an open source, self-hosted alternative to [flomo](https://flomoapp.com/). Built with `Go` and `React`.
-
-Making sure that you are in charge of your data and more customizations.
+Built with `Go`, `SQLite` and `React`.
 
 ## 🎯 Intentions
 
-- ✍️ For noting 📅 daily/weekly plans, 💡 fantastic ideas, 📕 reading thoughts...
-- 📒 Write down the lightweight card memos easily;
-- 🏗️ Build your own fragmented knowledge management tools;
+- ✍️ Write down the light-card memos very easily;
+- 🏗️ Build the fragmented knowledge management tool for yourself;
+- 📒 For noting your 📅 daily/weekly plans, 💡 fantastic ideas, 📕 reading thoughts...
 
 ## ✨ Features
 
 - 🦄 Fully open source;
-- 😋 Beautiful and detailed visual styles;
-- 📑 Experience excellent interaction logic;
-- ⚡️ Quick privatization deployment;
+- 🤠 Great UI and never miss any detail;
+- 🚀 Super quick self-hosted with `Docker` and `SQLite`;
 
 ## ⚓️ Deploy with Docker
 
 ```docker
-docker run --name memos --publish 8080:8080 --volume ~/path/to/your/data/:/var/opt/memos -e mode=prod neosmemo/memos:dev
+docker run --name memos --publish 8080:8080 --volume /path/to/your/data/:/var/opt/memos -e mode=prod neosmemo/memos:dev
 ```
 
 If the `/path/to/your/data` doesn't have a `memos_prod.db` file, then `memos` will auto-generate it and the default username is `dear_musk` with password `secret`.
 
+## 🏗 Development
+
+Memos is built with a curated tech stack. It is optimized for developer experience and is very easy to start working on the code:
+
+1. It has no external dependency.
+2. It requires zero config.
+3. 1 command to start backend and 1 command to start frontend, both with live reload support.
+
+### Tech Stack
+
+![tech-stack](https://raw.githubusercontent.com/justmemos/memos/main/resources/tech-stack.png)
+
+### Prerequisites
+
+- [Go](https://golang.org/doc/install) (1.16 or later)
+- [Air](https://github.com/cosmtrek/air#installation) for backend live reload
+- [yarn](https://yarnpkg.com/getting-started/install)
+
+### Steps
+
+1. pull source code
+
+   ```bash
+   git clone https://github.com/justmemos/memos
+   ```
+
+2. start backend using air(with live reload)
+
+   ```bash
+   air -c scripts/.air.toml
+   ```
+
+3. start frontend dev server
+
+   ```bash
+   cd frontend && yarn && yarn dev
+   ```
+
+Memos should now be running at https://localhost:3000 and change either frontend or backend code would trigger live reload.
+
 ## 🌟 Star history
 
 [![Star History Chart](https://api.star-history.com/svg?repos=justmemos/memos&type=Date)](https://star-history.com/#justmemos/memos&Date)