Add app scaffold and workflows

app/.dockerignore

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+# ==============================================================================
+# .dockerignore – Python + Next.js (Docker Compose)
+# ==============================================================================
+
+# ----------------------------------------------------------------------------
+# Git & Version Control
+# ----------------------------------------------------------------------------
+.git
+.gitignore
+.gitattributes
+.github
+.gitpod.yml
+
+# ----------------------------------------------------------------------------
+# Python-specific (already in .gitignore, but repeat for safety)
+# ----------------------------------------------------------------------------
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+*.egg-info/
+.installed.cfg
+*.egg
+*.manifest
+*.spec
+
+# Virtual environments & caches
+.venv
+venv/
+env/
+ENV/
+.pixi/
+__pypackages__/
+.tox/
+.nox/
+.pdm-python
+.pdm-build/
+
+# Testing & coverage
+htmlcov/
+.coverage
+.coverage.*
+.pytest_cache/
+.coverage/
+.ruff_cache/
+.mypy_cache/
+.pyre/
+.pytype/
+
+# Jupyter / notebooks
+.ipynb_checkpoints
+
+# IDEs & editors
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# ----------------------------------------------------------------------------
+# Next.js / Node.js
+# ----------------------------------------------------------------------------
+node_modules/
+.next/
+out/
+build/
+dist/                 
+.npm
+.pnp.*
+.yarn/
+.yarn-cache/
+.yarn-unplugged/
+
+# TypeScript build info
+*.tsbuildinfo
+next-env.d.ts
+
+# Logs & debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# ----------------------------------------------------------------------------
+# Environment & Secrets (never send to Docker daemon)
+# ----------------------------------------------------------------------------
+.env
+.env.local
+.env*.local
+.env.production
+.env.development
+.envrc
+*.pem
+*.key
+*.crt
+*.secrets
+.streamlit/secrets.toml
+
+# ----------------------------------------------------------------------------
+# Docker & Compose (avoid recursive inclusion)
+# ----------------------------------------------------------------------------
+Dockerfile*
+docker-compose*.yml
+docker-compose*.yaml
+.dockerignore
+
+# ----------------------------------------------------------------------------
+# Misc / OS
+# ----------------------------------------------------------------------------
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Local documentation builds
+/site
+docs/_build/
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.log
+
+# ==============================================================================
+# End of file
+# ==============================================================================