doc: fix typos in quick install guide

doc/quick-install.md

 
 ### Install Jitsi Meet
 
-Note : Something to consider before installation is how you're planning to serve Jitsi Meet. The installer will check if Nginx or Apache is present (with this order) and configure a virtualhost within the web server it finds to serve Jitsi Meet. If none of the above is found it then configures itself to be served via jetty. So if for example you are planning on deploying Jitsi Meet with a web server, you have to make sure to install the server **before** installing jitsi-meet.
+Note: Something to consider before installation is how you're planning to serve Jitsi Meet. The installer will check if Nginx or Apache is present (with this order) and configure a virtualhost within the web server it finds to serve Jitsi Meet. If none of the above is found it then configures itself to be served via jetty. So if for example you are planning on deploying Jitsi Meet with a web server, you have to make sure to install the server **before** installing jitsi-meet.
 
 ```sh
 apt-get -y install jitsi-meet
 org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=<Local.IP.Address>
 org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=<Public.IP.Address>
 ```
-See [the documenation of ice4j](https://github.com/jitsi/ice4j/blob/master/doc/configuration.md)
+See [the documentation of ice4j](https://github.com/jitsi/ice4j/blob/master/doc/configuration.md)
 for details.
 
 Default deployments on systems using systemd will have low default values for maximum processes and open files. If the used bridge will expect higher number of participants the default values need to be adjusted (the default values are good for less than 100 participants).
 ```
 To load the values and check them look [here](#systemd-details) for details.
 
-By default, anyone who has access to your jitsi instance will be able to start a conferencee: if your server is open to the world, anyone can have a chat with anyone else. If you want to limit the ability to start a conference to registered users, set up a "secure domain". Follow the instructions at https://github.com/jitsi/jicofo#secure-domain.
+By default, anyone who has access to your jitsi instance will be able to start a conference: if your server is open to the world, anyone can have a chat with anyone else. If you want to limit the ability to start a conference to registered users, set up a "secure domain". Follow the instructions at https://github.com/jitsi/jicofo#secure-domain.
 
 ### Open a conference