first commit

src/config/appConfig.js

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+const path = require('path');
+const fs = require('fs');
+const yaml = require('js-yaml');
+
+// Load YAML configuration file
+let yamlConfig = {};
+try {
+  const configPath = path.join(__dirname, '..', '..', 'fylgja.yml');
+  const fileContents = fs.readFileSync(configPath, 'utf8');
+  yamlConfig = yaml.load(fileContents);
+  console.log('Successfully loaded fylgja.yml configuration');
+} catch (error) {
+  console.error(`Error loading fylgja.yml: ${error.message}`);
+  console.log('Using default configuration values');
+  // Default values will be used if file cannot be loaded
+}
+
+// Base directory for resolving relative paths from config
+const baseDir = path.join(__dirname, '..', '..');
+
+// Configuration paths
+module.exports = {
+
+  SLACK_CONFIG: {
+    botToken: yamlConfig?.slack?.bot_token || process.env.SLACK_BOT_TOKEN,
+    signingSecret: yamlConfig?.slack?.signing_secret || process.env.SLACK_SIGNING_SECRET
+  },
+
+  // Server configuration from YAML (with fallback to env vars)
+  SERVER_CONFIG: {
+    port: parseInt(yamlConfig?.server?.port || process.env.PORT || 3000)
+  },
+
+  // Path configurations
+  SIGMA_REPO_DIR: yamlConfig?.paths?.sigma_repo_dir 
+    ? path.resolve(baseDir, yamlConfig.paths.sigma_repo_dir)
+    : path.join(baseDir, 'sigma-repo'),
+  
+  DB_PATH: yamlConfig?.paths?.db_path
+    ? path.resolve(baseDir, yamlConfig.paths.db_path)
+    : path.resolve(baseDir, 'sigma.db'),
+  
+  // Load SIGMA_CLI_PATH from YAML, env, or use default path
+  SIGMA_CLI_PATH: yamlConfig?.sigma?.['sigma-cli']?.path
+    ? path.resolve(baseDir, yamlConfig.sigma['sigma-cli'].path)
+    : path.join(process.env.VIRTUAL_ENV || './.venv', 'bin', 'sigma'),
+  
+  // Sigma CLI configuration from YAML
+  SIGMA_CLI_CONFIG: {
+    backend: yamlConfig?.sigma?.['sigma-cli']?.backend || "lucene",
+    target: yamlConfig?.sigma?.['sigma-cli']?.target || "ecs_windows",
+    format: yamlConfig?.sigma?.['sigma-cli']?.format || "siem_rule_ndjson"
+  },
+  
+  // Sigma Repository configuration from YAML
+  SIGMA_REPO_CONFIG: {
+    url: yamlConfig?.sigma?.repo?.url || "https://github.com/SigmaHQ/sigma.git",
+    branch: yamlConfig?.sigma?.repo?.branch || "main"
+  },
+  
+  // Elasticsearch configuration from YAML
+  ELASTICSEARCH_CONFIG: {
+    apiEndpoint: yamlConfig?.elastic?.['api-endpoint'] || 
+                 "http://localhost:5601/api/detection_engine/rules",
+    credentials: yamlConfig?.elastic?.['elastic-authentication-credentials'] || 
+                 "elastic:changeme"
+  },
+  
+  // Logging configuration from YAML
+  LOGGING_CONFIG: {
+    level: yamlConfig?.logging?.level || "info",
+    file: yamlConfig?.logging?.file || "./logs/fylgja.log"
+  },
+  
+  // Default configuration (fallback)
+  DEFAULT_CONFIG: {
+    siem: 'elasticsearch',
+    lang: 'lucene',
+    output: 'ndjson',
+    repoUrl: yamlConfig?.sigma?.repo?.url || "https://github.com/SigmaHQ/sigma.git",
+    repoBranch: yamlConfig?.sigma?.repo?.branch || "main"
+  }
+};