tweak: use virtualization-optimized kernel

src/emulator/image/.gitignore

@@ -0,0 +1 @@
+build

src/emulator/image/Dockerfile

@@ -2,7 +2,7 @@ FROM i386/alpine:edge
 
 RUN  apk add --update \
         alpine-base bash ncurses shadow curl \
-        linux-lts linux-firmware-none linux-headers \
+        linux-virt linux-firmware-none linux-headers \
         gcc make gcompat musl-dev libx11-dev xinit \
         bind-tools \
         util-linux \

src/emulator/image/build/.gitignore

@@ -1,2 +0,0 @@
-*
-!.gitignore

src/emulator/src/main.js

@@ -46,10 +46,10 @@ window.onload = async function()
         },
         
         initrd: {
-            url: './image/build/boot/initramfs-lts',
+            url: './image/build/boot/initramfs-virt',
         },
         bzimage: {
-            url: './image/build/boot/vmlinuz-lts',
+            url: './image/build/boot/vmlinuz-virt',
             async: false
         },
         cmdline: 'rw root=/dev/sda init=/sbin/init rootfstype=ext4',