Add pre-commit configuration

- Added Black for code formatting (line-length 120)
- Added isort for import sorting
- Added flake8 for linting
- Added standard pre-commit hooks for file checks

Co-Authored-By: Claude <noreply@anthropic.com>

.env.back

@@ -0,0 +1,87 @@
+# Northern Thailand Ping River Monitor Configuration
+# Copy this file to .env and customize for your environment
+
+# Database Configuration
+DB_TYPE=postgresql
+# Options: sqlite, mysql, postgresql, influxdb, victoriametrics
+
+# SQLite Configuration (default)
+WATER_DB_PATH=water_levels.db
+
+# VictoriaMetrics Configuration
+VM_HOST=localhost
+VM_PORT=8428
+VM_URL=
+
+# InfluxDB Configuration
+INFLUX_HOST=localhost
+INFLUX_PORT=8086
+INFLUX_DATABASE=ping_river_monitoring
+INFLUX_USERNAME=
+INFLUX_PASSWORD=
+
+# PostgreSQL Configuration (Remote Server)
+# Option 1: Full connection string (URL encode special characters in password)
+#POSTGRES_CONNECTION_STRING=postgresql://username:url_encoded_password@your-postgres-host:5432/water_monitoring
+
+# Option 2: Individual components (password will be automatically URL encoded)
+POSTGRES_HOST=10.0.10.201
+POSTGRES_PORT=5432
+POSTGRES_DB=ping_river
+POSTGRES_USER=ping_river
+POSTGRES_PASSWORD=3_%m]k:+16"rx?M#`swIA
+
+# Examples for connection string:
+# - Local: postgresql://postgres:password@localhost:5432/water_monitoring
+# - Remote: postgresql://user:pass@192.168.1.100:5432/water_monitoring
+# - With special chars: postgresql://user:my%3Apass%40word@host:5432/db
+# - With SSL: postgresql://user:pass@host:port/db?sslmode=require
+# - Connection pooling: postgresql://user:pass@host:port/db?pool_size=20&max_overflow=0
+
+# Special character URL encoding:
+# : → %3A    @ → %40    # → %23    ? → %3F    & → %26    / → %2F    % → %25
+
+# MySQL Configuration
+MYSQL_CONNECTION_STRING=mysql://user:password@localhost:3306/ping_river_monitoring
+
+# API Configuration
+API_HOST=0.0.0.0
+API_PORT=8000
+API_WORKERS=1
+
+# Data Collection Settings
+SCRAPING_INTERVAL_HOURS=1
+REQUEST_TIMEOUT=30
+MAX_RETRIES=3
+RETRY_DELAY_SECONDS=60
+
+# Data Retention
+DATA_RETENTION_DAYS=365
+
+# Logging Configuration
+LOG_LEVEL=INFO
+LOG_FILE=water_monitor.log
+
+# Security (for production)
+SECRET_KEY=your-secret-key-here
+API_KEY=your-api-key-here
+
+# Monitoring
+ENABLE_METRICS=true
+ENABLE_HEALTH_CHECKS=true
+
+# Geographic Settings
+TIMEZONE=Asia/Bangkok
+DEFAULT_LATITUDE=18.7875
+DEFAULT_LONGITUDE=99.0045
+
+# External Services
+NOTIFICATION_EMAIL=
+SMTP_SERVER=
+SMTP_PORT=587
+SMTP_USERNAME=
+SMTP_PASSWORD=
+
+# Development Settings
+DEBUG=false
+DEVELOPMENT_MODE=false