Add README

Author: tuxuser

README.md

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+# Hyperion.NG for WebOS
+
+Binaries are ready to install from [Homebrew Channel](https://repo.webosbrew.org/apps/org.webosbrew.hyperion.ng.loader)
+
+## Requirements
+
+* Linux host system
+* WebOS buildroot toolchain - arm-webos-linux-gnueabi_sdk-buildroot (https://github.com/openlgtv/buildroot-nc4/releases)
+* git
+* CMake
+* npm
+
+## Build
+
+Build hyperion.ng: `./build_hyperion_ng.sh`
+
+Build webOS frontend/service: `./build.sh`
+
+Both scripts take an environment variable `TOOLCHAIN_DIR`, defaulting to: `$HOME/arm-webos-linux-gnueabi_sdk-buildroot`
+
+To provide an individual path, call `export TOOLCHAIN_DIR=/your/toolchain/path` before executing respective scripts.
+
+`build_hyperion_ng.sh` also takes two other environment variables:
+
+- `HYPERION_NG_REPO`
+- `HYPERION_NG_BRANCH`
+
+## References
+
+Ambient lighting service/daemon: [Hyperion.NG](https://github.com/hyperion-project/hyperion.ng)
+
+Video grabber of webOS: [hyperion-webos](https://github.com/webosbrew/hyperion-webos)
+
+Frontend of Video grabber hyperion-webos: [piccap](https://github.com/TBSniller/piccap)
+
+## Credits
+
+@Smx-smx
+@TBSniller
+@Informatic
+@Mariotaku
+@Lord-Grey
+@Paulchen-Panther
+@chbartsch