Adds note to add fluent-ffmpeg to external

Author: samejr

docs/config/config-file.mdx

@@ -659,6 +659,8 @@ export default defineConfig({
 
 This extension will also add the `FFMPEG_PATH` and `FFPROBE_PATH` to your environment variables, making it easy to use popular ffmpeg libraries like `fluent-ffmpeg`.
 
+Note that `fluent-ffmpeg` needs to be added to [`external`](/config/config-file#external) in your `trigger.config.ts` file.
+
 Follow [this example](/guides/examples/ffmpeg-video-processing) to get setup with Trigger.dev and FFmpeg in your project.
 
 #### esbuild plugins

docs/guides/examples/ffmpeg-video-processing.mdx

@@ -36,6 +36,8 @@ export default defineConfig({
 
 You'll also need to add `@trigger.dev/build` to your `package.json` file under `devDependencies` if you don't already have it there.
 
+If you are modifying this example and using popular FFmpeg libraries like `fluent-ffmpeg` you'll also need to add them to [`external`](/config/config-file#external) in your `trigger.config.ts` file.
+
 ## Compress a video using FFmpeg
 
 This task demonstrates how to use FFmpeg to compress a video, reducing its file size while maintaining reasonable quality, and upload the compressed video to R2 storage.

docs/guides/frameworks/supabase-edge-functions-database-webhooks.mdx

@@ -270,6 +270,8 @@ export default defineConfig({
   if you don't already have it there.
 </Note>
 
+If you are modifying this example and using popular FFmpeg libraries like `fluent-ffmpeg` you'll also need to add them to [`external`](/config/config-file#external) in your `trigger.config.ts` file.
+
 ### Add your Deepgram and Supabase environment variables to your Trigger.dev project
 
 You will need to add your `DEEPGRAM_SECRET_KEY`, `SUPABASE_PROJECT_URL` and `SUPABASE_SERVICE_ROLE_KEY` as environment variables in your Trigger.dev project. This can be done in the 'Environment Variables' page in your project dashboard.