Remove config.json, install @ngx-env/builder to load OIDC configuration from env variables/files

compose.yml

@@ -24,6 +24,9 @@ services:
     build:
       context: ./frontend
       dockerfile: Dockerfile
+      args:
+        - OIDC_ISSUER_URI=${OIDC_ISSUER_URI:-http://localhost:8090/realms/voidAuth}
+        - OIDC_CLIENT_ID=${OIDC_CLIENT_ID:-lmnp-client}
     container_name: lmnp-frontend
     ports:
       - "80:80"