How to install Freeboard offline charts?

[MartinT]

Hi there,
seems like i need the Signal K Node server Charts plugin @signalk/charts-plugin
i tried to install this via the Appstore and it failed.

Then i tried in console with
pi@openplotter:~ $ sudo /bin/bash
root@openplotter:/home/pi# npm i @signalk/charts-plugin

it tried to install sqlite3 and failed:

> sqlite3@4.1.1 install /home/pi/node_modules/sqlite3
> node-pre-gyp install --fallback-to-build

node-pre-gyp WARN Using request for node-pre-gyp https download
node-pre-gyp WARN Tried to download(403): https://mapbox-node-binary.s3.amazonaws....arm.tar.gz
node-pre-gyp WARN Pre-built binaries not found for sqlite3@4.1.1 and node@8.17.0 (node-v57 ABI, glibc) (falling back to source compile with node-gyp)
gyp WARN EACCES current user ("pi") does not have permission to access the dev dir "/root/.cache/node-gyp/8.17.0"
gyp WARN EACCES attempting to reinstall using temporary dev dir "/home/pi/node_modules/sqlite3/.node-gyp"
make: Entering directory '/home/pi/node_modules/sqlite3/build'
make: *** No rule to make target '../.node-gyp/8.17.0/include/node/common.gypi', needed by 'Makefile'. Stop.
make: Leaving directory '/home/pi/node_modules/sqlite3/build'
gyp ERR! build error

i tested to download the sqlite package with wget end got Error 403: Forbidden.

wget https://mapbox-node-binary.s3.amazonaws....arm.tar.gz
--2020-01-01 12:37:46-- https://mapbox-node-binary.s3.amazonaws....arm.tar.gz
Resolving mapbox-node-binary.s3.amazonaws.com (mapbox-node-binary.s3.amazonaws.com)... 52.216.177.203
Connecting to mapbox-node-binary.s3.amazonaws.com (mapbox-node-binary.s3.amazonaws.com)|52.216.177.203|:443... connected.
HTTP request sent, awaiting response... 403 Forbidden
2020-01-01 12:37:47 ERROR 403: Forbidden.

Any suggestions?

Best Regards,
Martin