Update readme

closes #3

README.md

@@ -4,8 +4,8 @@ Image hosting service
 
 ## Features
 - [NIP-96 Support](https://github.com/nostr-protocol/nips/blob/master/96.md)
-- [Blossom Support](https://github.com/hzrd149/blossom/blob/master/buds/bud-01.md)
-- Image compression to WebP (FFMPEG, NIP-96)
+- [Blossom Support](https://github.com/hzrd149/blossom/blob/master/buds/01.md)
+- Image compression to WebP (FFMPEG, NIP-96 only)
 - Blurhash calculation (NIP-96 only)
 - AI image labeling ([ViT224](https://huggingface.co/google/vit-base-patch16-224))
 
@@ -28,4 +28,24 @@ docker run --rm -it \
   -v ./config.toml:/app/config.toml \
   -e "RUST_LOG=info" \
   voidic/void-cat-rs
+```
+
+## Building
+
+### Feature Flags
+Default = `nip96` & `blossom`
+- `nip96`: Enable NIP-96 support
+- `blossom`: Enable blossom support
+- `labels`: Enable AI image labeling (Depends on `nip96`)
+
+### Default build: 
+`cargo build --release`
+
+### Build only Blossom support
+`cargo build --release --no-default-features --features blossom`
+
+### Build dependencies
+If you want to support NIP-96 you will need the following dependencies:
+```bash
+libavcodec-dev libavformat-dev libswscale-dev libavutil-dev libavdevice-dev libavfilter-dev
 ```