feat: consolidate backend and docker-compose setup

backend/config/vllm_config.yaml

@@ -0,0 +1,7 @@
+# vLLM backend tuning for paddleocr genai_server
+# Docs: https://www.paddleocr.ai/latest/en/version3.x/pipeline_usage/PaddleOCR-VL.html#331-server-side-parameter-adjustment
+gpu-memory-utilization: 0.6
+max-num-seqs: 4
+enforce-eager: true
+max-model-len: 2048
+max-num-batched-tokens: 2048