Add Docker support with sigra container

.dockerignore

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+__pycache__
+*.pyc
+.git
+.gitignore
+venv
+.env
+*.md
+Dockerfile
+docker-compose.yml

Dockerfile

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+FROM python:3.13-slim
+
+WORKDIR /app
+
+RUN pip install --no-cache-dir flask==3.1.3 jinja2==3.1.6 werkzeug==3.1.6
+
+COPY . .
+
+ENV FLASK_APP=app.py
+ENV FLASK_RUN_HOST=0.0.0.0
+ENV FLASK_RUN_PORT=5000
+
+EXPOSE 5000
+
+CMD ["python", "app.py"]

build.sh

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+#!/bin/bash
+set -e
+
+echo "Building Docker image: sigra"
+docker build -t sigra .
+echo "Build complete!"

run.sh

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+#!/bin/bash
+set -e
+
+echo "Starting sigra container..."
+docker run -d --name sigra -p 5000:5000 sigra
+echo "Container 'sigra' is running!"
+echo "Open http://localhost:5000"