Adding functional usage of client self updater #10

- Added update command to the server
- Server can request nodes update
- Nodes have an 'endpoint' for updating
- Fixes to the install script

client/setup.sh

@@ -49,7 +49,7 @@ prompt_nearby_system() {
     fi
 
     echo "\"$system_name\": {
-    \"frequencies\": [$(echo "$frequencies" | sed 's/,/","/g')],
+    \"frequencies\": [\"$(echo "$frequencies" | sed 's/,/","/g')\"],
     \"mode\": \"$mode\",
     \"trunkFile\": \"$trunk_file\",
     \"whitelistFile\": \"$whitelist_file\"
@@ -113,7 +113,7 @@ systems_json="${systems_json%,}"  # Remove trailing comma
 systems_json+="}"
 
 # Append the created systems to the presets file
-mkdir ./config
+mkdir -p ./config
 echo "$systems_json" >> "./config/radioPresets.json"
 
 echo "Systems added to radioPresets.json."