chore: initial Coolify deployment config

.env.example

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+DOCLING_SERVE_ENABLE_UI=true
+PORT=5001

.gitignore

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+.env

docker-compose.yml

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+services:
+  docling:
+    image: quay.io/docling-project/docling-serve:latest
+    ports:
+      - "${PORT:-5001}:5001"
+    environment:
+      - DOCLING_SERVE_ENABLE_UI=${DOCLING_SERVE_ENABLE_UI:-true}
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:5001/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+    restart: unless-stopped