fix builder to set image version and hostname on build

builder/pwnagotchi.json

@@ -1,7 +1,4 @@
 {
-  "variables": {
-    "home": "{{env `HOME`}}"
-  },
   "builders": [{
     "name": "pwnagotchi",
     "type": "arm-image",
@@ -22,7 +19,8 @@
     },
     {
       "type":"ansible-local",
-      "playbook_file": "pwnagotchi.yml"
+      "playbook_file": "pwnagotchi.yml",
+      "command": "ANSIBLE_FORCE_COLOR=1 PYTHONUNBUFFERED=1 PWN_VERSION={{user `pwn_version`}} PWN_HOSTNAME={{user `pwn_hostname`}} ansible-playbook"
     },
     {
       "type": "shell",