bumped default distro in demos, bound mariadb to all ips, added template explaination

faafo/contrib/install.sh

@@ -88,18 +88,20 @@ if [[ -e /etc/os-release ]]; then
             # HSFD changes for Ubuntu 18.04
             #sudo sed -i -e "/bind-address/d" /etc/mysql/mysql.conf.d/mysqld.cnf
             ##sudo sed -i -e "/bind-address/d" /etc/mysql/my.cnf
+            sudo sed -i -e "s/127.0.0.1/0.0.0.0/g" /etc/mysql/mariadb.conf.d/50-server.cnf
+            sudo mysqmladmin password password
             sudo systemctl restart mariadb
         elif [[ $ID = 'fedora' ]]; then
             # fedora currently not tested nor supported
             sudo dnf install -y mariadb-server python3-mysql
             printf "[mysqld]\nbind-address = 127.0.0.1\n" | sudo tee /etc/my.cnf.d/faafo.conf
+            sudo mysqmladmin password password
             sudo systemctl enable mariadb
             sudo systemctl start mariadb
         else
             echo "error: distribution $ID not supported"
             exit 1
         fi
-        sudo mariadb-admin password password
         sudo mysql -uroot -ppassword mysql -e "CREATE DATABASE IF NOT EXISTS faafo; GRANT ALL PRIVILEGES ON faafo.* TO 'faafo'@'%' IDENTIFIED BY 'password';"
         URL_DATABASE='mysql://root:password@localhost/faafo'
     fi

faafo/faafo/api/templates/index.html

@@ -57,9 +57,9 @@ yb = {{ fractal.yb }}</pre>
 </div>
 {% endfor %}
 {{render_pagination(fractals)}}
-<!--
+<!-- requires POST request to have Content-Type: "application/vnd.api+json" header, would require Fetch API or XMLHTTPRequest etc.
 <div>
-  <form action="/v1/fractal" method="POST" enctype="application/vnd.api+json">
+  <form action="/v1/fractal" method="POST">
     <input type="submit" value="Create new fractals">
   </form>
 </div>