Agregar src/assets en angular.json
"assets": [
{
"glob": "_redirects",
"input": "src",
"output": "/"
},
{
"glob": "**/*.svg",
"input": "node_modules/ionicons/dist/ionicons/svg",
"output": "./svg"
},
"src/manifest.webmanifest",
"src/manifest.webmanifest",
"src/assets"
],
