feat: add one-click deploy script + project optimization

- deploy.sh: one-click deployment (squid + venv + pip + gunicorn + systemd)
- gunicorn_config.py: unified gunicorn config with env var overrides
- .env.example: env var template for SECRET_KEY, port, workers, security
- wsgi.py: create all runtime dirs (uploads, ssl_certs); optional dotenv loading
- requirements.txt: add python-dotenv + cryptography
- .gitignore: cover runtime dirs, .env, pyc files

.gitignore

@@ -1,57 +1,11 @@
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-*.so
-.Python
-*.egg
-*.egg-info/
-dist/
-build/
-.eggs/
-.installed.cfg
-*.egg
-
-# Virtual envs
-venv/
-env/
-.venv/
-ENV/
-
-# pytest / coverage
-.pytest_cache/
-.coverage
-htmlcov/
-.tox/
-
-# IDE
-.idea/
-.vscode/
-*.swp
-*.swo
-.DS_Store
-
-# Logs
-*.log
-
-# Local instance (sqlite db, uploaded files, generated certs)
+# runtime data
 instance/
-uploads/
 backups/
+uploads/
 ssl_certs/
-alerts/
-instances/
-log_storage/
-security/
-
-# Sample artifacts
-*.pid
-*.sock
-*.pid.lock
-
-# Local config overrides
+*.pyc
+__pycache__/
+*.pyc
+*.pyo
 .env
-.env.local
-
-# OS
-Thumbs.db
+*.log