[Dockerfile] -d while Installing npm dependencies.

[AshishKapoor]

Describe the bug
Curious, why there's a -d flag and not simply npm i or npm ci in the Dockerfile?

RUN echo "Installing npm dependencies..." && \
    npm install -d

To Reproduce
Steps to reproduce the behavior:

1. Go to https://github.com/rilldata/rill-developer/blob/4db2c267f64e80817c627704c854fe359003dc6e/Dockerfile#L14

Expected behavior
Can we use npm i or npm ci?

Screenshots
If applicable, add screenshots to help explain your problem.
NA

Desktop (please complete the following information):

• OS: ubuntu server 20.04
• Browser chrome
• Version 103.0.5060.114 (Official Build) (arm64)