How To setup Go Web Application Using Nginx on Ubuntu 18.04

Video Tutorial -https://youtu.be/5PIZjnwo3NM
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Go is an open source programming language developed by a team at Google. It provides easy to build simple, reliable, and efficient software.
NGINX is a famous open source web server software.               
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Our Server Specification-    
Os:Ubuntu 18.04 LTS Bionic Beaver 64Bit   |IP address- 192.168.1.50  | Hostname :www.yourdomain.com
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lsb_release -cd ; hostname ; hostname -I ; whoami ; getconf LONG_BIT ; apt install -y build-essential software-properties-common curl gdebi net-tools wget curl sqlite3 dirmngr nano lsb-release apt-transport-https leafpad git sudo unzip socat bash-completion checkinstall imagemagick openssl

curl -O https://dl.google.com/go/go1.12.1.linux-amd64.tar.gz
tar -xvf go1.12.1.linux-amd64.tar.gz -C /usr/local
chown -R root:root /usr/local/go
mkdir -p $HOME/go/{bin,src}
nano ~/.profile
export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin
export PATH=$PATH:$GOPATH/bin:/usr/local/go/bin
. ~/.profile
echo $PATH ; go version

mkdir $GOPATH/go-web ; cd $GOPATH/go-web
nano main.go
package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello World")
    })

    http.HandleFunc("/greet/", func(w http.ResponseWriter, r *http.Request) {
        name := r.URL.Path[len("/greet/"):]
        fmt.Fprintf(w, "Hello %s\n", name)
    })

    http.ListenAndServe(":9990", nil)
}

go build main.go
nano /lib/systemd/system/goweb.service
[Unit]
Description=goweb

[Service]
Type=simple
Restart=always
RestartSec=5s
ExecStart=/root/go/go-web/main


[Install]
WantedBy=multi-user.target

systemctl daemon-reload
service goweb start ; service goweb status

apt install nginx -y
nano /etc/nginx/conf.d/yourdomain.conf
server {
    listen [::]:80;
    listen 80;
    server_name www.yourdomain.com;

    location / {
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_pass http://127.0.0.1:9990;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_next_upstream error timeout http_502 http_503 http_504;
    }
}
rm /etc/nginx/sites-enabled/default ; nginx -t  ; echo "192.168.1.50 www.yourdomain.com" >> /etc/hosts ; systemctl restart nginx 
www.yourdomain.com

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