gulp logspam on first run

Created by: nicksnyder

On a fresh checkout when I run ./dev/launch.sh for the first time I see a bunch of errors like this.

11:08:41               web | src/auth.ts:4:22 - error TS2307: Cannot find module './backend/graphqlschema'.
11:08:41               web | 4 import * as GQL from './backend/graphqlschema'
11:08:41               web |                        ~~~~~~~~~~~~~~~~~~~~~~~~~
...
11:08:41               web | [11:08:41] Found 196 errors. Watching for file changes.
11:08:42               web | [11:08:42] File change detected. Starting incremental compilation...
11:09:03      repo-updater | INFO update loop, last: 1m0.012950368s, stats: fetches: 0 manual/0 auto, repos: 0 queued/0 seen, loops: 6, timescale: 0.00
11:09:10               web | src/user/account/UserAccountSidebar.tsx:75:61 - error TS7006: Parameter 'org' implicitly has an 'any' type.
11:09:10               web | 75                         {props.user.organizations.nodes.map(org => (
11:09:10               web |                                                                ~~~
11:09:10               web | src/user/area/UserHeader.tsx:66:69 - error TS7006: Parameter 'org' implicitly has an 'any' type.
11:09:10               web | 66                                 {props.user.organizations.nodes.map(org => (
11:09:10               web |                                                                        ~~~
11:09:10               web | [11:09:10] Found 2 errors. Watching for file changes.
11:09:15               web | [BABEL] Note: The code generator has deoptimised the styling of /Users/nick/dev/gopath/src/github.com/sourcegraph/sourcegraph/node_modules/mdi-react/dist/index.es.js as it exceeds the max of 500KB.
11:09:32               web | ℹ ｢wdm｣: Time: 83130ms
11:09:32               web | ℹ ｢wdm｣: Compiled successfully.
11:09:32               web | ℹ ｢wdm｣: Compiling...
11:09:33               web | ℹ ｢wdm｣: Time: 778ms
11:09:33               web | ℹ ｢wdm｣: Compiled successfully.

It seems like everything works out in the end, but would be ideal to avoid this in the first place.

It is also unclear which subtask is the source of these logs.