Added render.yaml and start.sh for deployment

render.yaml

@@ -0,0 +1,11 @@
+services:
+  - type: web
+    name: nlp-assistant
+    env: python
+    plan: starter
+    region: oregon
+    buildCommand: pip install -r requirements.txt
+    startCommand: ./start.sh
+    envVars:
+      - key: PYTHON_VERSION
+        value: 3.10

start.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Optional: install missing spaCy model manually (if not auto-installed)
+python -m spacy download en_core_web_md
+
+# Start Streamlit app
+streamlit run app.py --server.port=$PORT --server.address=0.0.0.0