Apps daemonized with pm2 not working with nginx - node.js

Question

Firstly, I'm sorry about my poor english and also I warn you that i'm a newbie still learning those technologies that I'm going to talk about.
So, I work on a companie and they needed some simple pages apps. I choose to use the React.js technologie with an Node.js API running with Express. (Sorry if I am wrong about the terms but I'm not english and still student).
I've done my 2 react apps and my api that are actually working correctly. I must deploy them on a CentOs. SO I've "daemonized" my 2 react apps and my API. The first react app with the port :8080, the other one with the port :3000 and the api, with the port :8081.
Then I installed Nginx, with a simple conf. It worked well. After that I've been trying to use https. So I did. But I'm now facing a problem.
When I try to reach one of my apps, I got a blank page with those messages :
GET https://domain_name/src/index.js net::ERR_ABORTED 404 (index):19
GET https://domain_name/static/js/2.3d1c602b.chunk.js net::ERR_ABORTED 404 (index):20
GET https://domain_name/static/js/main.95db8d0e.chunk.js net::ERR_ABORTED 404 manifest.json:1
GET https://domain_name/manifest.json 404 manifest.json:1
Manifest: Line: 1, column: 1, Syntax error.
And if I try to reach one of my api routes I get this :
Cannot GET /api/oneThing
and :
GET https://patt_www_ppd/api/ 404 patt_www_ppd/:1
I couldn't figure out with the problem in the net. I've found some possible solutions but I didn't understood them or it didn't worked. Can somebody help me?
Here is my nginx.conf :
pid /run/nginx.pid;
worker_processes auto;
worker_rlimit_nofile 65535;
events {
multi_accept on;
worker_connections 65535;
}
http {
charset utf-8;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
server_tokens off;
log_not_found off;
types_hash_max_size 2048;
client_max_body_size 16M;
# MIME
include mime.types;
default_type application/octet-stream;
# logging
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log warn;
# SSL
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:10m;
ssl_session_tickets off;
# Diffie-Hellman parameter for DHE ciphersuites
ssl_dhparam /etc/nginx/dhparam.pem;
# Mozilla Intermediate configuration
ssl_protocols TLSv1.2;
ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
# OCSP Stapling
ssl_stapling on;
ssl_stapling_verify on;
resolver 1.1.1.1 1.0.0.1 8.8.8.8 8.8.4.4 208.67.222.222 208.67.220.220 valid=60s;
resolver_timeout 2s;
# load configs
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
And here is my domain_name.conf under the /sites-available/ directory :
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name domain_name;
# SSL
ssl_certificate /etc/certifs/domain_name.pem;
ssl_certificate_key /etc/certifs/domain_name.key;
# security
include nginxconfig.io/security.conf;
# logging
access_log /var/log/nginx/domain_name.access.log;
error_log /var/log/nginx/domain_name.error.log warn;
# reverse proxy
location /inventaire/ {
proxy_pass http://127.0.0.1:8080;
include nginxconfig.io/proxy.conf;
}
location /api/ {
proxy_pass http://127.0.0.1:8081;
include nginxconfig.io/proxy.conf;
}
location /ticket/ {
proxy_pass http://127.0.0.1:3000;
include nginxconfig.io/proxy.conf;
}
# additional config
include nginxconfig.io/general.conf;
}
# subdomains redirect
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name *.domain_name;
# SSL
ssl_certificate /etc/certifs/domain_name.pem;
ssl_certificate_key /etc/certifs/domain_name.key;
return 301 https://domain_name$request_uri;
}
# HTTP redirect
server {
listen 80;
listen [::]:80;
server_name .domain_name;
return 301 https://domain_name$request_uri;
}
I really thank anyone that can bring me some answers... And again, sorry for my english and my poor abilities in this domain, but I'm still learning.