added jumpdrive installation

content/mobile/linux/devices/pine64/pinephone/braveheart.md

@@ -376,6 +376,8 @@ You might have to run it twice or more if you get an error.
   
 <<Warn("Use numbers for your user password. This is the same password for your lock screen, which contains only numbers.")>>
 
+<<Note("See also <a href'#jumpdrive'>JumpDrive</a>.)>>
+
 ```
 pmbootstrap install --sdcard=/dev/mmcblk2
 ```
@@ -476,6 +478,7 @@ To install on eMMC, you must first install it on a [SD CARD](/content/mobile/lin
 __Or:__  
 Same as [postmarketOS](/content/mobile/linux/devices/pine64/pinephone/braveheart#postmarketos_emmc)
 
+<<Note("See also <a href'#jumpdrive'>JumpDrive</a>.)>>
  
 
 ### Flash the image
@@ -497,4 +500,35 @@ sudo parted /dev/mmcblk2 resizepart 1 100%
 sudo shutdown now
 ```
 
-That's it. Remove the SD CARD and start your phone.</https:></https:></https:></https:>
+That's it. Remove the SD CARD and start your phone.</https:></https:></https:></https:>
+
+ 
+
+# JumpDrive
+
+Download [latest .img](https://github.com/dreemurrs-embedded/Jumpdrive/releases/) and flash it with [Etcher](https://www.balena.io/etcher/).
+
+## Detailed Usage Instructions
+
+1. Download the Jumpdrive image
+2. Flash the Jumpdrive image to a micro SD card
+3. Boot the PinePhone from the Jumpdrive micro SD card
+4. Connect the PinePhone to your computer using USB-A -> USB-C cable
+5. Flash the exposed (mounted) PinePhone drive with a chosen OS image
+6. Once the flashing process is complete, disconnect the PinePhone from your PC, power it down and remove the Jumpdrive SD card
+7. The process is now finished, and you can boot from eMMC
+  
+Jumpdrive also acts as a rescue image in case if you messed up your installation. To do so, you can telnet to 172.16.42.1, mount rootfs and fix it!
+
+
+## Resize file system
+
+If you flash a 4G img distro (ie. phosh+debian) to your eemc, your eemc will only have a 3.7G partition on it. To use the entire 14.7G on the eemc, run the following commands:
+
+1. sudo cfdisk /dev/sdX
+2. Change to [Resize] in the ncurses program, resize the 3.7G partition to 14.7G, and [Write]
+3. sudo resize2fs /dev/sdXY
+
+Replace X with your drive's name. Replace Y with the paritition you resized in cfdisk. 
+
+Source: [wiki.pine64.org](https://wiki.pine64.org/index.php/PinePhone#Flashing_eMMC_using_Jumpdrive)