fix(cmd-api-server): health-check endpoint crash - no OpenAPI metadata

[petermetz]

$ yarn tap --ts --timeout=6666 --no-coverage pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.362Z] DEBUG (config-service): Configuration validation OK.
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.363Z] INFO (api-server): Setting tls.DEFAULT_MAX_VERSION to TLSv1.3...
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.364Z] INFO (api-server): wwwRoot: ./node_modules/@dci-lint/cockpit/www/
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.364Z] INFO (api-server): resolvedWwwRoot:
/****/dci-lint/node_modules/@dci-lint/cockpit/www
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.364Z] INFO (api-server): resolvedIndexHtml:
/****/dci-lint/node_modules/@dci-lint/cockpit/www/index.html
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.366Z] INFO (api-server): Cockpit net.AddressInfo { address:
'127.0.0.1', family: 'IPv4', port: 37591 }
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.370Z] INFO (api-server): Starting to install web services...
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.371Z] DEBUG (IgnoreFileParser): Created instance OK
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.371Z] INFO (api-server): DCI Lint API net.AddressInfo { address:
'127.0.0.1', family: 'IPv4', port: 40441 }
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.371Z] INFO (api-server): DCI Lint API reachable http://127.0.0.1:40441
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.371Z] INFO (api-server): Cockpit reachable http://127.0.0.1:37591
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 2> Not Found: not found
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 2>     at
/****/dci-lint/node_modules/express-openapi-validator/src/middlewares/openapi.metadata.ts:58:13
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 2>     at
/****/dci-lint/node_modules/express-openapi-validator/src/openapi.validator.ts:147:18
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 2>     at processTicksAndRejections (node:internal/process/task_queues:95:5)
​ FAIL ​ pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts
 ✖ Error: Request failed with status code 404

  test: pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts
  operator: error
  at: bound
    (/****/dci-lint/node_modules/tape-promise/node_modules/onetime/index.js:30:12)
  stack: >-
    Error: Request failed with status code 404
        at createError (/****/dci-lint/node_modules/axios/lib/core/createError.js:16:15)
        at settle (/****/dci-lint/node_modules/axios/lib/core/settle.js:17:12)
        at IncomingMessage.handleStreamEnd (/****/dci-lint/node_modules/axios/lib/adapters/http.js:269:11)
        at IncomingMessage.emit (node:events:525:35)
        at IncomingMessage.emit (node:domain:489:12)
        at endReadableNT (node:internal/streams/readable:1359:12)
        at processTicksAndRejections (node:internal/process/task_queues:82:21)

pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.501Z] INFO (api-server): Shutting down API server ...
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.501Z] INFO (api-server): Closing HTTP server of the API...
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.502Z] INFO (api-server): Close HTTP server of the API OK
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.502Z] INFO (api-server): Closing HTTP server of the cockpit ...
pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1> [2022-12-21T23:22:50.502Z] INFO (api-server): Close HTTP server of the cockpit OK
​ FAIL ​ pkg/test-cmd-api-server/src/test/typescript/integration/api-server.test.ts 1 failed of 1 3s
 ✖ Error: Request failed with status code 404