Bump node from 21.7.2 to 22.0.0 in /docs

Bumps node from 21.7.2 to 22.0.0.

---
updated-dependencies:
- dependency-name: node
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:21.7.2
+FROM node:22.0.0
 RUN apt-get update && apt-get install -y jq
 WORKDIR /usr/src/app
 COPY package.json /usr/src/