Use custom init script instead of postinstall (#5384)

* Use custom init script instead of postinstall

* Revert changes to start scripts in src\electron

* feat: add --ignore-scripts flag to npm install commands in batch and shell scripts

* feat: add --ignore-scripts flag to npm ci in Dockerfile

start.sh

@@ -10,7 +10,8 @@ fi
 
 echo "Installing Node Modules..."
 export NODE_ENV=production
-npm i --no-save --no-audit --no-fund --loglevel=error --no-progress --omit=dev
+npm install --no-save --no-audit --no-fund --loglevel=error --no-progress --omit=dev --ignore-scripts
+npm run init
 
 echo "Entering SillyTavern..."
 node "server.js" "$@"