Add NobroRTOS community links

Author: Codex

README.md

@@ -12,6 +12,8 @@
   <img alt="Arduino" src="https://img.shields.io/badge/Arduino-ready-00878F?logo=arduino&logoColor=white">
   <img alt="PlatformIO" src="https://img.shields.io/badge/PlatformIO-ready-F5822A?logo=platformio&logoColor=white">
   <img alt="Rust no_std" src="https://img.shields.io/badge/Rust-no__std-000000?logo=rust&logoColor=white">
+  <a href="https://discord.gg/NrRrQKmT2"><img alt="Join Discord" src="https://img.shields.io/badge/Discord-join%20us-5865F2?logo=discord&logoColor=white"></a>
+  <a href="https://www.youtube.com/@NiusRobotLab"><img alt="NiusRobotLab on YouTube" src="https://img.shields.io/badge/YouTube-NiusRobotLab-FF0000?logo=youtube&logoColor=white"></a>
   <a href="LICENSE"><img alt="GPL-3.0-only" src="https://img.shields.io/badge/license-GPL--3.0--only-blue"></a>
 </p>
 
@@ -143,6 +145,22 @@ superiority claim against a differently configured RTOS.
 - [8-bit C/assembly guide](ports/byte/README.md)
 - [Measured resource envelope](docs/CORE_BENCHMARKS.md)
 
+## Go further with NobroRTOS
+
+Need capabilities beyond the public Core? We also provide customized NobroRTOS
+cores with advanced features for product-specific timing, safety, connectivity,
+AI, robotics, and hardware requirements.
+
+Join the community on [Discord](https://discord.gg/NrRrQKmT2) to discuss your
+project, request a customized solution, or build with other embedded creators.
+For demos, tutorials, and new projects, visit
+[NiusRobotLab on YouTube](https://www.youtube.com/@NiusRobotLab).
+
+<p align="center">
+  <a href="https://discord.gg/NrRrQKmT2"><img src="docs/images/discord_niusrobotlab.jpg" alt="Scan to join the NobroRTOS Discord" width="220"></a><br>
+  <strong>Scan or click to join the NobroRTOS Discord</strong>
+</p>
+
 ## License and commercial use
 
 NobroRTOS Core is open source under **GPL-3.0-only**. Commercial use is allowed

docs/images/discord_niusrobotlab.jpg

@@ -53,6 +53,7 @@
 )
 SOURCE_SUFFIXES = {".c", ".h", ".py", ".rs", ".s", ".asm"}
 PUBLIC_ASSETS = {
+    "docs/images/discord_niusrobotlab.jpg",
     "docs/images/Nobro_full.png",
     "docs/images/Nobro_simple.png",
 }
@@ -83,7 +84,7 @@ def main() -> int:
         if path.suffix.lower() in FORBIDDEN_SUFFIXES:
             failures.append(f"generated/binary file is tracked: {relative.as_posix()}")
         if relative.as_posix() in PUBLIC_ASSETS:
-            if path.suffix.lower() != ".png" or path.stat().st_size > 4_000_000:
+            if path.suffix.lower() not in {".jpg", ".png"} or path.stat().st_size > 4_000_000:
                 failures.append(f"invalid public image asset: {relative.as_posix()}")
             continue
         if path.stat().st_size > 1_000_000: