Fix nginx.conf to preserve AWS_CONTAINER_CREDENTIALS_RELATIVE_URI

"AWS_CONTAINER_CREDENTIALS_RELATIVE_URI" is set when "00-check-for-required-env.sh" runs. In "awscredentials.js" -> "fetchCredentials", however, the "AWS_CONTAINER_CREDENTIALS_RELATIVE_URI" is not set anymore and erroneously, "_fetchEC2RoleCredentials" instead of "_fetchEcsRoleCredentials" is called.

common/etc/nginx/nginx.conf

@@ -12,6 +12,7 @@ load_module modules/ngx_http_xslt_filter_module.so;
 env AWS_ACCESS_KEY_ID;
 env AWS_SECRET_ACCESS_KEY;
 env AWS_SESSION_TOKEN;
+env AWS_CONTAINER_CREDENTIALS_RELATIVE_URI;
 env S3_BUCKET_NAME;
 env S3_SERVER;
 env S3_SERVER_PORT;