Bump airnode to v0.15.0

[dcroote]

A downstream fix for api3dao/data-feed-reader-example#199 since airnode-feed is pulling in airnode-node v0.14.2 which is pulling in commons ^0.5.0

[dcroote]

The weird CI failures (also happening in renovate PRs 1 and 2):

   > [build 8/8] RUN pnpm run --recursive build:
  0.899 Scope: 4 of 5 workspace projects
  0.902 packages/airnode-feed build$ tsc --project tsconfig.build.json
  0.910 packages/airnode-feed build: sh: 1: tsc: not found
  0.911 /app/packages/airnode-feed:
  0.911  ERR_PNPM_RECURSIVE_RUN_FIRST_FAIL  @api3/airnode-feed@2.1.0 build: `tsc --project tsconfig.build.json`
  0.911 spawn ENOENT
  0.912  WARN   Local package.json exists, but node_modules missing, did you mean to install?

occur because pnpm behavior changed and the Dockerfile command:

signed-api/Dockerfile

Line 21 in 2014e72

RUN npm install -g pnpm

installs the latest pnpm and not the one from package.json.

Consequently this PR also updates the dockerfile to install the pnpm version in package.json.

[Siegrift]

👍 LGTM, thanks!

[dcroote]

Sure thing (and as confirmation the other renovate PRs are now passing).

No rush, but would you be able to release? Alternatively I could try (not entirely sure if I have the permissions) if you had thoughts on minor vs. patch.

[Siegrift]

Alternatively I could try (not entirely sure if I have the permissions) if you had thoughts on minor vs. patch.

It should be a minor. Although I don't see the point in doing the release now.

[dcroote]

Airnode v0.14 being a part of signed-api is causing problems in other packages, hence why I think we should release.

[Siegrift]

I see. We don't have yet reports of this being a problem in here, but there is no reason to wait. I'll do a release now. Should be as simple as https://github.com/api3dao/signed-api/blob/main/README.md#versioning-and-release

[dcroote]

Thanks @Siegrift !