Immich: increase disk resource; add logic for determining upload location change

- Increasing disk resources to 20GB
- Adding 'IMMICH_MEDIA_LOCATION' env var to .env - edit this to change
Immich upload location
- Read IMMICH_MEDIA_LOCATION from env during update for dynamic symlinks

frontend/public/json/immich.json

@@ -21,7 +21,7 @@
       "resources": {
         "cpu": 4,
         "ram": 4096,
-        "hdd": 16,
+        "hdd": 20,
         "os": "Debian",
         "version": "12"
       }
@@ -39,6 +39,10 @@
     {
       "text": "If using OpenVINO HW machine-learning, increase RAM because OpenVINO is memory-intensive",
       "type": "info"
+    },
+    {
+      "text": "To change upload location, edit 'IMMICH_MEDIA_LOCATION' in `/opt/immich/.env`",
+      "type": "info"
     }
   ]
 }