diff --git a/Dockerfile b/Dockerfile
index 56f2f8b..36f8ae7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.16
+FROM alpine:3.17
 
 # set version label
 ARG BUILD_DATE
@@ -44,7 +44,6 @@ RUN \
  tar xf \
  /tmp/webapp.tar.gz -C \
         /app/ --strip-components=1 && \
- npm config set unsafe-perm true && \
  npm install --prefix /app
 
 ENV TFTPD_OPTS=''
diff --git a/root/etc/supervisor.conf b/root/etc/supervisor.conf
index 986420e..36c2a86 100644
--- a/root/etc/supervisor.conf
+++ b/root/etc/supervisor.conf
@@ -23,6 +23,7 @@ priority = 3
 
 [program:in.tftpd]
 command=/usr/sbin/in.tftpd -Lvvv --user nbxyz --secure %(ENV_TFTPD_OPTS)s /config/menus
+user=nbxyz
 stdout_logfile=/config/tftpd.log
 redirect_stderr=true
 priority = 4
diff --git a/scripts/shell.sh b/scripts/shell.sh
new file mode 100755
index 0000000..f4960af
--- /dev/null
+++ b/scripts/shell.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+echo Building local core environment image...
+docker build -t docker-netbootxyz .
+echo Entering docker-netbootxyz shell... type exit to leave container...
+docker run -v /var/run/docker.sock:/var/run/docker.sock -v $(pwd):/shell -t -i docker-netbootxyz /bin/bash