How to configure NGINX to distribute PWA in https - nginx

Question

I'm trying to redirect an APP that already works, to https.
The app is a PWA that is running locally, on 8080 port.
I know that's something in my configuration, because the root works ok, but the sub apps doesn't.
The root is just a html with the routes for the sub apps.
This is the app that I'm trying to redirect: https://github.com/PolymerLabs/multitenant-prpl
This is my configuration file, that I've made with searching around and mixing things into the main nginx configuration file.
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
keepalive_timeout 65;
upstream node-app {
least_conn;
server 192.168.0.9:8080 weight=10 max_fails=3 fail_timeout=30s;
}
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
# https redirection
location / {
return 301 https://$host$request_uri;
}
}
server {
# http2 setup
listen 443 ssl http2 default_server;
listen [::]:443 ssl http2 default_server;
server_name node-app;
# ssl setup
ssl_certificate /etc/nginx/certs/nginx.crt;
ssl_certificate_key /etc/nginx/certs/nginx.key;
ssl_dhparam /etc/nginx/certs/dhparam.pem;
# server redirection
location / {
proxy_pass http://node-app$request_uri;
proxy_redirect off;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_cache_bypass $http_upgrade;
}
}
}
Probably something is missing.
Thanks in advance.
Images:
The root working.
Another route with the dev tools open, the error is a bit longer.