docs: add socketfilterfw --unblock /usr/libexec/bootpd for vmnet issues

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

README.md

@@ -327,6 +327,7 @@ The current default spec:
   - [Networking](#networking)
     - ["Cannot access the guest IP 192.168.5.15 from the host"](#cannot-access-the-guest-ip-192168515-from-the-host)
     - ["Ping shows duplicate packets and massive response times"](#ping-shows-duplicate-packets-and-massive-response-times)
+    - ["IP address is not assigined for vmnet networks"](#ip-address-is-not-assigined-for-vmnet-networks)
   - [Filesystem sharing](#filesystem-sharing)
     - ["Filesystem is slow"](#filesystem-is-slow)
     - ["Filesystem is not writable"](#filesystem-is-not-writable)
@@ -470,6 +471,13 @@ PING google.com (172.217.165.14): 56 data bytes
 
 For more details, see [Documentation/Networking](https://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29).
 
+#### "IP address is not assigined for vmnet networks"
+Try the following commands:
+```bash
+/usr/libexec/ApplicationFirewall/socketfilterfw --add /usr/libexec/bootpd
+/usr/libexec/ApplicationFirewall/socketfilterfw --unblock /usr/libexec/bootpd
+```
+
 ### Filesystem sharing
 #### "Filesystem is slow"
 Try virtiofs. See [`docs/mount.md`](./docs/mount.md)

docs/network.md

@@ -141,6 +141,13 @@ The network daemon is started automatically when the first instance referencing
 and will stop automatically once the last instance has stopped. Daemon logs will be stored in the
 `$LIMA_HOME/_networks` directory.
 
+The IP address is automatically assigned by macOS's bootpd.
+If the IP address is not assigned, try the following commands:
+```bash
+/usr/libexec/ApplicationFirewall/socketfilterfw --add /usr/libexec/bootpd
+/usr/libexec/ApplicationFirewall/socketfilterfw --unblock /usr/libexec/bootpd
+```
+
 #### Unmanaged
 For Lima >= 0.12:
 ```yaml