Adding GPU support for transcription

.env.example

@@ -35,6 +35,26 @@ OPENAI_API_KEY=
 # OPENAI_TRANSCRIBE_MODEL=whisper-1
 # OPENAI_TRANSCRIBE_TIMEOUT=600
 
+# Local Whisper settings
+# Choose CPU explicitly unless you have a working GPU runtime in Docker
+WHISPER_DEVICE=cpu
+# Model and precision (large-v3 int8 is accurate but heavy; consider medium/small for speed)
+WHISPER_MODEL=large-v3
+WHISPER_PRECISION=int8
+# Threads for CPU inference
+WHISPER_CPU_THREADS=4
+
+# --- GPU (CUDA) optional setup ---
+# To enable NVIDIA GPU acceleration:
+# 1) Install NVIDIA driver on the host and the NVIDIA Container Toolkit
+# 2) Set the Docker runtime to NVIDIA for the worker containers
+# DOCKER_GPU_RUNTIME=nvidia
+# 3) Ensure GPU visibility (default is all)
+# NVIDIA_VISIBLE_DEVICES=all
+# 4) Use GPU-friendly precision and device
+# WHISPER_DEVICE=cuda
+# WHISPER_PRECISION=float16
+
 # Docker volumes paths
 LIBRARY_HOST_DIR=/mnt/nfs/library
 TRANSCRIPTS_HOST_DIR=/mnt/nfs/transcripts