feat: ✨ initial commit

.env.example

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+SECRET_KEY=change-me-to-a-long-random-string
+# Set in production behind HTTPS:
+# SESSION_COOKIE_SECURE=true
+# SESSION_PERMANENT=true
+# SESSION_DAYS=14
+
+# Web operator login (single user)
+WEBAPP_USERNAME=admin
+# Plain password
+WEBAPP_PASSWORD=change-me
+# Or use a Werkzeug hash instead of plain WEBAPP_PASSWORD:
+# WEBAPP_PASSWORD_HASH=pbkdf2:sha256:600000$...
+
+# Encrypts SSH passwords and keys at rest (any string; hashed to Fernet key internally)
+CREDENTIALS_ENCRYPTION_KEY=change-me-to-a-long-secret
+
+# MariaDB / MySQL
+MYSQL_HOST=127.0.0.1
+MYSQL_PORT=3306
+MYSQL_USER=sshweb
+MYSQL_PASSWORD=change-me
+MYSQL_DATABASE=ssh_web
+MYSQL_POOL_SIZE=5
+
+# Max simultaneous SSH sessions from this app instance
+MAX_CONCURRENT_SSH=32
+
+# Paramiko SSH keepalive interval (seconds); set 0 to disable.
+SSH_KEEPALIVE_INTERVAL=30