Nginx white page with no error - nginx

Question

I'm new to nginx. I'm trying to use kubernetes with nginx. But I get a blank page and no error... what can I do ?
Here my configuration :
server {
listen 80;
root /var/www/project/web;
location / {
# try to serve file directly, fallback to app.php
try_files $uri /app.php$is_args$args;
}
# DEV
# This rule should only be placed on your development environment
# In production, don't include this and don't deploy app_dev.php or config.php
location ~ ^/(app_dev|config)\.php(/|$) {
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}
# PROD
location ~ ^/app\.php(/|$) {
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
# Prevents URIs that include the front controller. This will 404:
# http://domain.tld/app.php/some-path
# Remove the internal directive to allow URIs like this
#internal;
}
error_log /var/log/nginx/project_error.log;
access_log /var/log/nginx/project_access.log;
}
Edit :
I run it in a docker-compose, now I get this when I launch :
web_1 | * Restarting PHP5 FastCGI Process Manager php5-fpm
Edit 2
connect() to unix:/var/run/php/php7.0-fpm.sock failed (2: No such file
or directory) while connecting to upstream