🐳 feat: RAG for Default Docker Compose Files + Docs Update (#2246)

* refactor(deploy-compose.yml): use long-syntax to avoid implicit folder creation of librechat.yaml

* refactor(docker-compose.override.yml.example): use long-syntax to avoid implicit folder creation of librechat.yaml

* chore: add simple health check for RAG_API_URL

* chore: improve axios error handling, adding `logAxiosError`

* chore: more informative message detailing RAG_API_URL path

* feat: add rag_api and vectordb to default compose file

* chore(rag.yml): update standalone rag compose file to use RAG_PORT

* chore: documentation updates

* docs: Update rag_api.md with images

* Update rag_api.md

* Update rag_api.md, assistants clarification

* add RAG API note to breaking changes

api/utils/logAxiosError.js

@@ -0,0 +1,45 @@
+const { logger } = require('~/config');
+
+/**
+ * Logs Axios errors based on the error object and a custom message.
+ *
+ * @param {Object} options - The options object.
+ * @param {string} options.message - The custom message to be logged.
+ * @param {Error} options.error - The Axios error object.
+ */
+const logAxiosError = ({ message, error }) => {
+  const timedOutMessage = 'Cannot read properties of undefined (reading \'status\')';
+  if (error.response) {
+    logger.error(
+      `${message} The request was made and the server responded with a status code that falls out of the range of 2xx: ${
+        error.message ? error.message : ''
+      }. Error response data:\n`,
+      {
+        headers: error.response?.headers,
+        status: error.response?.status,
+        data: error.response?.data,
+      },
+    );
+  } else if (error.request) {
+    logger.error(
+      `${message} The request was made but no response was received: ${
+        error.message ? error.message : ''
+      }. Error Request:\n`,
+      {
+        request: error.request,
+      },
+    );
+  } else if (error?.message?.includes(timedOutMessage)) {
+    logger.error(
+      `${message}\nThe request either timed out or was unsuccessful. Error message:\n`,
+      error,
+    );
+  } else {
+    logger.error(
+      `${message}\nSomething happened in setting up the request. Error message:\n`,
+      error,
+    );
+  }
+};
+
+module.exports = logAxiosError;