chore(config): define returned config obj types

src/config/index.js

@@ -34,10 +34,26 @@ function parseCorsParameter(param) {
 	return param;
 }
 
+/**
+ * @typedef {object} Config
+ * @property {string} tempDir - Directory for temporarily storing files during conversion.
+ * @property {import("fastify").FastifyListenOptions} fastify - Fastify server listen options.
+ * @property {import("fastify").FastifyServerOptions} fastifyInit - Fastify server initialisation options.
+ * @property {import("@fastify/cors").FastifyCorsOptions} cors - CORS configuration.
+ * @property {import("@fastify/under-pressure").UnderPressureOptions} processLoad - Process load handling configuration.
+ * @property {import("@fastify/rate-limit").FastifyRateLimitOptions} rateLimit - Rate limiting configuration.
+ * @property {import("@fastify/helmet").FastifyHelmetOptions} helmet - Helmet configuration.
+ * @property {import("@fastify/swagger").FastifyDynamicSwaggerOptions} swagger - Swagger configuration.
+ * @property {{ tempDir: string }} poppler - Poppler configuration.
+ * @property {{ enabled: boolean; languages: string; workers: number }} tesseract - Tesseract OCR configuration.
+ * @property {{ tempDir: string }} unrtf - UnRTF configuration.
+ * @property {Set<string>} [bearerTokenAuthKeys] - Bearer token auth keys.
+ */
+
 /**
  * @author Frazer Smith
  * @description Validates environment variables and builds server config.
- * @returns {Promise<object>} A promise that resolves with a server config object, or rejects with an `Error` object
+ * @returns {Promise<Config>} A promise that resolves with a server config object, or rejects with an `Error` object
  * if HTTPS is enabled and the required files are not found.
  */
 async function getConfig() {

src/server.js

@@ -30,7 +30,7 @@ const tidyHtml = require("./plugins/tidy-html");
  * @author Frazer Smith
  * @description Builds Fastify instance.
  * @param {import("fastify").FastifyInstance} server - Fastify instance.
- * @param {object} config - Fastify configuration values.
+ * @param {import("./config").Config} config - Server configuration.
  */
 async function plugin(server, config) {
 	/**