Proper error handling in backend code

[mesudip]

What

Backend should not crash when there error during a request handling

drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    | }
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    | Error retrieving all documents: {
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |   error: {
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     root_cause: [ [Object] ],
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     type: 'index_not_found_exception',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     reason: 'no such index [prod_drep_metadata_preview]',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     'resource.type': 'index_or_alias',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     'resource.id': 'prod_drep_metadata_preview',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     index_uuid: '_na_',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     index: 'prod_drep_metadata_preview'
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |   },
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |   status: 404
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    | }
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    | AxiosError: Request failed with status code 404
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at settle (/app/node_modules/axios/dist/node/axios.cjs:2019:12)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at Unzip.handleStreamEnd (/app/node_modules/axios/dist/node/axios.cjs:3135:11)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at Unzip.emit (node:events:530:35)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at endReadableNT (node:internal/streams/readable:1698:12)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at Axios.request (/app/node_modules/axios/dist/node/axios.cjs:4287:41)
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |   code: 'ERR_BAD_REQUEST',
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |   config: {
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     transitional: {
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |       silentJSONParsing: true,
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |       forcedJSONParsing: true,
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |       clarifyTimeoutError: false
drep_id_backend-preview.1.ni0gb2k5ahbr@prod1    |     },