ERROR USING NGINX AS REVERSE PROXY

Getting this error using NGINX as reverse proxy. Tried using / as a redirect but it gives error 404 not found. could try to use on any server
the code is attached below.
thanks

http {
include 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 logs/access.log main;

sendfile on;
#tcp_nopush on;

#keepalive_timeout 0;
keepalive_timeout 65;

#gzip on;
upstream myapp1 {
server http://www.google.com;
}
server {
listen 80;
server_name localhost;

#charset koi8-r;

#access_log logs/host.access.log main;

#location {
# root html;
# index index.html index.htm;

location /test {

proxy_pass http://myapp1;

}