Add .env and .env.example files; implement development script and Docker connection logic

.env.example

@@ -0,0 +1,13 @@
+# Backup Configuration
+BACKUP_FOLDER=/data/volumes
+BACKUP_CRON=*/5 * * * *
+
+# FTP Configuration
+FTP_HOST=ftp.example.com
+FTP_PORT=21
+FTP_USER=backup_user
+FTP_PASSWORD=secret123
+FTP_PATH=/backups
+
+# Docker Configuration
+DOCKER_HOST=unix:///var/run/docker.sock