feat: initial commit

Author: TheOutdoorProgrammer

.env.example

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+# External-DNS Firewalla Webhook Configuration
+
+# Required: Comma-separated list of domain filters
+# Example: example.com,*.example.com,test.local
+DOMAIN_FILTER=example.com
+
+# Optional: Provider API port (default: 8888)
+PORT_PROVIDER=8888
+
+# Optional: Health check API port (default: 8080)
+PORT_HEALTH=8080
+
+# Optional: Default TTL for DNS records in seconds (default: 300)
+DNS_TTL=300
+
+# Optional: Path to dnsmasq configuration directory
+# Default: /home/pi/.firewalla/config/dnsmasq_local
+DNSMASQ_DIR=/home/pi/.firewalla/config/dnsmasq_local
+
+# Optional: Log level (error, warn, info, debug) (default: info)
+LOG_LEVEL=info
+
+# Optional: Dry run mode - don't actually make changes (default: false)
+DRY_RUN=false

.gitignore

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+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Logs
+logs/
+*.log
+
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Testing
+coverage/
+.nyc_output/
+
+# Temporary files
+*.tmp
+*.temp

LICENSE

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+MIT License
+
+Copyright (c) 2025 TheOutdoorProgrammer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.