Simplify make install.* examples

We use PRFIX=/opt/socket_vment by default, and we recommend to use the
default location for good reasons. Show the recommend commands without
the unneeded PREFIX.

Mention PREFIX in the next paragraph about avoiding bad locations like
/usr/local.

Using non-default location introduces the risk of using a directory
writable by unprivileged user and complicates lima configuration which
defaults to /opt/socket_vmnet.

Signed-off-by: Nir Soffer <[email protected]>

Author: nirs

README.md

@@ -151,19 +151,20 @@ sudo port unload socket_vmnet
 <p>
 
 ```bash
-sudo make PREFIX=/opt/socket_vmnet install.bin
+sudo make install.bin
 ```
 
-The `PREFIX` dir below does not necessarily need to be `/opt/socket_vmnet`, however, it is highly recommended
-to set the prefix to a directory that can be only written by the root.
-
-Note that `/usr/local/bin` is sometimes chowned for a non-admin user, so `/usr/local` is *not* an appropriate prefix.
-
-The binaries will be installed onto the following paths:
+This installs binaries using `PREFIX=/opt/socket_vmnet`:
 - `/opt/socket_vmnet/bin/socket_vmnet`
 - `/opt/socket_vmnet/bin/socket_vmnet_client`
 
+You can customize the install location using the `PREFIX` environment variable,
+however, it is highly recommended to set the prefix to a directory that can be
+only written by the root. Note that `/usr/local/bin` is sometimes chowned for a
+non-admin user, so `/usr/local` is *not* an appropriate prefix.
+
 Run the following command to start the daemon:
+
 ```bash
 sudo /opt/socket_vmnet/bin/socket_vmnet --vmnet-gateway=192.168.105.1 /var/run/socket_vmnet
 ```
@@ -177,7 +178,7 @@ sudo /opt/socket_vmnet/bin/socket_vmnet --vmnet-gateway=192.168.105.1 /var/run/s
 
 To install the launchd service:
 ```bash
-sudo make PREFIX=/opt/socket_vmnet install.launchd
+sudo make install.launchd
 ```
 
 The launchd unit file will be installed as `/Library/LaunchDaemons/io.github.lima-vm.socket_vmnet.plist`.
@@ -191,10 +192,9 @@ Stdout  | `/var/log/socket_vmnet/stdout`
 Stderr  | `/var/log/socket_vmnet/stderr`
 Gateway | 192.168.105.1
 
-
 To uninstall the launchd service:
 ```bash
-sudo make PREFIX=/opt/socket_vmnet uninstall.launchd
+sudo make uninstall.launchd
 ```
 
 </p>