Gitea

$ apt install software-properties-common apache2 wget git
$ apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
$ add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://nyc2.mirrors.digitalocean.com/mariadb/repo/10.1/ubuntu xenial main'
$ apt update
$ apt install -y mariadb-server
$ systemctl enable mariadb
$ systemctl start mariadb
$ mysql_secure_installation

$ mysql -u root -p
 MariaDB [(none)]> create database gitea;
 MariaDB [(none)]> grant all privileges on gitea.* to 'gitea'@localhost identified by 'your_password';

$ adduser \
     --system \
     --shell /bin/bash \
     --gecos 'Git Version Control' \
     --group \
     --disabled-password \
     --home /home/git \
     git

$ mkdir /usr/local/bin/gitea
$ mkdir /var/local/www/git

$ vim /etc/systemd/system/gitea.service
  < /etc/systemd/system/gitea.service >
    [Unit]
    Description=Gitea (Git with a cup of tea)
    After=syslog.target
    After=network.target
    ###
    # Don't forget to add the database service requirements
    ###
    #
    #Requires=mysql.service
    #Requires=mariadb.service
    #Requires=postgresql.service
    #Requires=memcached.service
    #Requires=redis.service
    #
    ###
    # If using socket activation for main http/s
    ###
    #
    #After=gitea.main.socket
    #Requires=gitea.main.socket
    #
    ###
    # (You can also provide gitea an http fallback and/or ssh socket too)
    #
    # An example of /etc/systemd/system/gitea.main.socket
    ###
    ##
    ## [Unit]
    ## Description=Gitea Web Socket
    ## PartOf=gitea.service
    ##
    ## [Socket]
    ## Service=gitea.service
    ## ListenStream=<some_port>
    ## NoDelay=true
    ##
    ## [Install]
    ## WantedBy=sockets.target
    ##
    ###
    [Service]
    # Modify these two values and uncomment them if you have
    # repos with lots of files and get an HTTP error 500 because
    # of that
    ###
    #LimitMEMLOCK=infinity
    #LimitNOFILE=65535
    RestartSec=2s
    Type=simple
    User=git
    Group=git
    # WorkingDirectory=/var/lib/gitea/
    WorkingDirectory=/usr/local/bin/gitea
    # If using Unix socket: tells systemd to create the /run/gitea folder, which will contain the gitea.sock file
    # (manually creating /run/gitea doesn't work, because it would not persist across reboots)
    #RuntimeDirectory=gitea
    # ExecStart=/usr/local/bin/gitea web --config /etc/gitea/app.ini
    ExecStart=/usr/local/bin/gitea/gitea web
    Restart=always
    # Environment=USER=git HOME=/home/git GITEA_WORK_DIR=/var/lib/gitea
    Environment=USER=git HOME=/home/git
    # If you want to bind Gitea to a port below 1024, uncomment
    # the two values below, or use socket activation to pass Gitea its ports as above
    ###
    #CapabilityBoundingSet=CAP_NET_BIND_SERVICE
    #AmbientCapabilities=CAP_NET_BIND_SERVICE
    ###
    [Install]
    WantedBy=multi-user.target
$ cd /usr/local/bin/gitea
$ wget -O gitea https://dl.gitea.io/gitea/1.4.2/gitea-1.4.2-linux-amd64
$ chmod +x /usr/local/bin/gitea/gitea
$ chown -R root:git /usr/local/bin/gitea
$ chmod 0775 /usr/local/bin/gitea
$ chmod g+s /usr/local/bin/gitea
$ chown -R root:git /var/local/www/git
$ mkdir /var/local/www/git/repos
$ chmod 0775 /var/local/www/git/repos
$ systemctl start gitea.service
$ systemctl enable gitea.service
$ systemctl status gitea.service