docs: update README

README.md

@@ -1,20 +1,95 @@
-# UEFI-Video
-Media renderer embedded in UEFI boot environment
+![header](https://capsule-render.vercel.app/api?type=waving&height=300&color=gradient&text=UEFI%20Video&section=header)
+
+## Badges
+
+[![MIT License](https://img.shields.io/badge/License-MIT-green.svg)](https://choosealicense.com/licenses/mit/)
+
+![Build](https://git.walruslab.org/mincomk/uefi-video/actions/workflows/build.yaml/badge.svg)
 
 ## Features
-- Render GIF
-- Render PNG
 
-## Requirements
-- Rust toolchain
-- Appropriate rust target
+- PNG/GIF Decoder
+- Render still image
+- Embed framed video to binary
+
+## Roadmap
+
+- Filesystem input support
+- Encryption
+
+## Screenshots
+
+![App Screenshot](.docs/assets/screenshot1.png)
+
+## Build/Run
+
+### Prerequisites
+
+- QEMU x86_64 emulator
+- `OVMF.fd`
+
+Clone the project
 
-## Build
 ```bash
-cargo build --target x86_64-unknown-uefi --release
-# result: uefi-video.efi
+  git clone https://git.walruslab.org/mincomk/uefi-video.git
 ```
 
-## Test Info
-Tested on:
-- `x86_64-unknown-uefi`
+Go to the project directory
+
+```bash
+  cd uefi-video
+```
+
+Modify config as you want: [Configuration](#Configuration)
+
+And build
+
+```bash
+  cargo build
+```
+
+Or run directly with QEMU
+
+```bash
+  cargo run
+```
+
+## Making IMG
+
+`.img` generation is intended to use from Linux. Contribution is welcome to support docs of other OS.
+
+```bash
+  dd if=/dev/zero of=boot.img bs=1M count=512 status=progress
+  mkfs.fat -F 32 boot.img
+  sudo mount boot.img mnt --mkdir
+  mkdir -p mnt/EFI/BOOT
+
+  # Change uefi-video.efi to the desired file.
+  # It's in releases if you download, and it's in target/x86_64-unknown-uefi/release if you build your own.
+  cp uefi-video.efi mnt/EFI/BOOT/bootx64.efi
+  sudo umount mnt
+  rmdir mnt
+
+  # use boot.img as you want
+```
+
+## Configuration
+
+You can configure the project with `config.rs`.
+
+### Default Config
+
+```rust
+// src/config.rs
+pub static DATA: &[u8] = include_bytes!("../assets/rainbow.png");
+pub static MEDIA_TYPE: MediaType = MediaType::ImagePNG;
+pub static SCALE: f32 = 1.0;
+```
+
+### Config Entries
+
+| Name         | Content                                         | Notes                               |
+| ------------ | ----------------------------------------------- | ----------------------------------- |
+| `DATA`       | `include_bytes!("ASSET_FILE")`                  | Path is relative to `src` directory |
+| `MEDIA_TYPE` | `MediaType::ImagePNG` or `MedidaType::VideoGIF` | Should match content of `DATA`      |
+| `SCALE`      | A scale factor                                  | `1.0` is an original size           |