fix: log2ram can't stop before it's installed

This commit fixes an issue with `setup/setup_device.sh` where log2ram
service would try to stop before log2ram was installed.  I copied the
log2ram logic from `rootfs/standard/usr/bin/mynode_post_upgrade.sh` as
it looks like it functions correctly.

In the future I think we should add a feature to disable log2ram since
it is really only needed when you are running on an sdcard or USB, but
that will be for another day.

setup/setup_device.sh

@@ -454,18 +454,21 @@ npm install -g yarn
 
 # Install Log2Ram
 if [ $IS_RASPI = 1 ] || [ $IS_X86 = 1 ]; then
-    cd /tmp
-    rm -rf log2ram*
-    wget https://github.com/azlux/log2ram/archive/v1.2.2.tar.gz -O log2ram.tar.gz
-    tar -xvf log2ram.tar.gz
-    mv log2ram-* log2ram
-    cd log2ram
-    chmod +x install.sh
-    service log2ram stop
-    ./install.sh
-    cd ~
+    if [ ! -f /usr/local/bin/log2ram ]; then
+        cd /tmp
+        rm -rf log2ram* || true
+        wget https://github.com/azlux/log2ram/archive/v1.2.2.tar.gz -O log2ram.tar.gz
+        tar -xvf log2ram.tar.gz
+        mv log2ram-* log2ram
+        cd log2ram
+        chmod +x install.sh
+        service log2ram stop || true
+        ./install.sh || true
+        cd ~
+    fi
 fi
 
+
 # Remove existing MOTD login info
 rm -rf /etc/motd
 rm -rf /etc/update-motd.d/*