How to add subresources integrity with Angular appShell build - build

Question

I built an application with Angular CLI 9.
I patched the package.json file with :
{
"scripts": {
"build:prod": "ng build --prod --subresource-integrity",
"prebuild:prod": "TS_NODE_COMPILER_OPTIONS='{\"module\": \"commonjs\"}' ts-node ./sitemap_generator.ts"
}
}
So, when I called npm run build:prod, my 2 commands are executed and output files generated by compiler contains SRI.
Now, I added the appShell :
npm run ng generate appShell -- --client-project my-project
To run the build with the appShell, I have to use the command :
npm run ng run my-project:app-shell:production
MAIN QUESTION
But this command calls my-project:build:production configuration of angular.json file, and this does not accept the --subresource-integrity argument :/
How to patch this to have appShell production build with SRI ?
SECONDARY QUESTION for the braves
This appShell build create a server/ folder in dist/. It just contains a main.js file. I suppose it's internally used with Node to build the appShell ; can someone confirm that ?
And so, can I use Unversal too with this architecture to do some SSR for search engines ?
Thanks !

Answer 1

Ok, I found a way by editing angular.json :
{
"$schema": "./node_modules/#angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "my-project",
"projects": {
"oce-training": {
"architect": {
"build": {
"configurations": {
"production": {
"subresourceIntegrity": true,
}
}
}
}
}
}
}
So, we cannot override on package.json or by CLI command, but it's sufficient for my case.
Now I have in package.json:
{
"scripts": {
"build:prod": "ng run oce-training:app-shell:production",
"prebuild:prod": "TS_NODE_COMPILER_OPTIONS='{\"module\": \"commonjs\"}' ts-node ./sitemap_generator.ts"
},
}
My question about SSR is maintained, but it could be another Stackoverflow post ;)