nginx: convert apache proxypass configuration to nginx not working - apache

Question

I have this configuration in apache working fine:
<VirtualHost *:80>
ServerAdmin mail#mail.com
ServerName opi4
<Directory "/var/www/html">
Require all denied
</Directory>
RewriteEngine on
RewriteRule "^/my-project$" "/my-project/" [L,R=301]
RewriteRule "^/amule$" "/amule/" [L,R=301]
RewriteRule "^/transmission$" "/transmission/web/" [L,R=301]
ProxyPass /my-project http://my-project.opi4
ProxyPassReverse /my-project http://my-project.opi4
ProxyPass /amule http://amule.opi4:4711
ProxyPassReverse /amule http://amule.opi4:4711
ProxyPass /transmission http://transmission.opi4:9091/transmission
ProxyPassReverse /transmission http://transmission.opi4:9091/transmission
ErrorLog ${APACHE_LOG_DIR}/error.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel debug
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
I writed this one to use it in nginx:
server {
listen 80;
server_name opi4;
location /amule {
rewrite ^/amule$ /amule/ permanent;
proxy_pass http://amule.opi4:4711;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
location /transmission {
rewrite ^/transmission$ /transmission/web/ permanent;
rewrite ^/transmission/$ /transmission/web/ permanent;
proxy_pass http://transmission.opi4:9091/transmission;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
location /my-project/ {
rewrite ^/my-project$ /my-project/ permanent;
proxy_pass http://my-project.opi4/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
/etc/hosts
127.0.0.1 amule.opi4
127.0.0.1 transmission.opi4
127.0.0.1 my-project.opi4
When I used with amule, transmission works fine, but no with my-project.
works: http://amule.opi4/
works: http://opi4/amule
works: http://transmission.opi4/
works: http://opi4/transmission
works: http://my-project.opi4/
NOT works: http://opi4/my-project it shows a "Welcome to nginx!" the same result as http://opi4/
some help will be apreciated, thank you