NetVisor: add build deps, increase RAM (#9205)

* NetVisor: add pkg-config as build dependency

- this will be needed for v0.9.2

* Add libssl-dev as build dependency

* Increase RAM to 3GB

* Change apt-get to apt for package installation

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Co-authored-by: CanbiZ <47820557+MickLesk@users.noreply.github.com>

frontend/public/json/netvisor.json

@@ -20,7 +20,7 @@
       "script": "ct/netvisor.sh",
       "resources": {
         "cpu": 2,
-        "ram": 2048,
+        "ram": 3072,
         "hdd": 6,
         "os": "Debian",
         "version": "13"