Docker Angular+Nginx error code 403 or 500

I have a .net application on backend with mssql and frontend with angular. I have written docker files and nginx.conf, everything works except angular 17 exactly in docker, the main problem is that on the path localhost:9000 I should get back frontend but instead I get errors 500 or 403

but if I try to make a direct request post localhost:9000/api/user I am redirected to backend(proxy is set on localhost:8000) and I get a list of users in json format. When I do npm run build I get the application structure dist/feedyre/ with 2 folders browser and server. I tried to change a lot of things but no luck, maybe someone has encountered this problem? here is my docker file:

FROM node:20.10.0 as build-env

WORKDIR /app

COPY . .
RUN npm install
RUN npm run build
FROM nginx:alpine
COPY --from=build-env /app/dist /usr/share/nginx/html
COPY nginx.conf /etc/nginx/nginx.conf


and here is my nginx.conf:

user nginx;
worker_processes auto;

error_log /var/log/nginx/error.log notice;
pid /var/run/nginx.pid;


events {
worker_connections 1024;
}

http {
client_max_body_size 10M;
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;

server {
listen 8080;
server_name feedyre;

root /usr/share/nginx/html/feedyre;
index index.html index.htm;
include /etc/nginx/mime.types;

gzip on;
gzip_min_length 1000;
gzip_proxied expired no-cache no-store private auth;
gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;


location /api/ {
proxy_pass http://http://localhost:8000/api/;
}
location / {
try_files $uri $uri/ /index.html;
}
}
}


I also tried to change the paths here in the docker file but either it is wrong or not the problem still the same errors COPY --from=build-env /app/dist /usr/share/nginx/html

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