feat(config): Use toml instead of env

src/config.ts

@@ -0,0 +1,32 @@
+import fs from 'fs';
+import path from 'path';
+import toml, { JsonMap } from '@iarna/toml';
+
+const configFileName = 'config.toml';
+
+interface Config {
+  GENERAL: {
+    PORT: number;
+    SIMILARITY_MEASURE: string;
+  };
+  API_KEYS: {
+    OPENAI: string;
+  };
+  API_ENDPOINTS: {
+    SEARXNG: string;
+  };
+}
+
+const loadConfig = () =>
+  toml.parse(
+    fs.readFileSync(path.join(process.cwd(), `${configFileName}`), 'utf-8'),
+  ) as any as Config;
+
+export const getPort = () => loadConfig().GENERAL.PORT;
+
+export const getSimilarityMeasure = () =>
+  loadConfig().GENERAL.SIMILARITY_MEASURE;
+
+export const getOpenaiApiKey = () => loadConfig().API_KEYS.OPENAI;
+
+export const getSearxngApiEndpoint = () => loadConfig().API_ENDPOINTS.SEARXNG;