Entrypoint doesn't write DRAWIO_MSGRAPH_TENANT_ID to msgraph_tenant_id

[rcross-lc]

The entrypoint script writes out DRAWIO_MSGRAPH_TENANT_ID to PreConfig.js, but not msgraph_tenant_id.

docker-drawio/main/docker-entrypoint.sh

Lines 100 to 111 in bcda4f2

	if [[ -z "${DRAWIO_MSGRAPH_CLIENT_ID}" ]]; then
	echo "urlParams['od'] = '0'; //OneDrive" >> $CATALINA_HOME/webapps/draw/js/PreConfig.js
	else
	#Google drive application id and client id for the editor
	echo "window.DRAWIO_MSGRAPH_CLIENT_ID = '${DRAWIO_MSGRAPH_CLIENT_ID}'; " >> $CATALINA_HOME/webapps/draw/js/PreConfig.js
	echo -n "${DRAWIO_MSGRAPH_CLIENT_ID}" > $CATALINA_HOME/webapps/draw/WEB-INF/msgraph_client_id
	echo -n "${DRAWIO_MSGRAPH_CLIENT_SECRET}" > $CATALINA_HOME/webapps/draw/WEB-INF/msgraph_client_secret
	if [[ "${DRAWIO_MSGRAPH_TENANT_ID}" ]]; then
	echo "window.DRAWIO_MSGRAPH_TENANT_ID = '${DRAWIO_MSGRAPH_TENANT_ID}'; " >> $CATALINA_HOME/webapps/draw/js/PreConfig.js
	fi
	fi

The server app is expecting to read the tenant id from this file here:

https://github.com/jgraph/drawio/blob/890ea0b7880f4962bfc2b25b35103286aad0d1cb/src/main/java/com/mxgraph/online/MSGraphAuth.java#L13

I can work around this by writing the tenant id out to a file and bind mounting it:

- type: bind
  source: ./msgraph_tenant_id
  target: /usr/local/tomcat/webapps/draw/WEB-INF/msgraph_tenant_id
  read_only: true

Also bonus meme: comments in this section reference google drive.