diff --git a/Dockerfile b/Dockerfile
index 6e49043..12879ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,7 @@
+#
+# Builder docker
+#
+
 FROM public.ecr.aws/docker/library/python:3.11-alpine AS builder
 
 RUN apk add build-base linux-headers
@@ -18,21 +22,42 @@ RUN rm -rf \
     src/*_test.py \
     psutil/tests
 
+
+#
+# Production docker
+#
+
 FROM public.ecr.aws/docker/library/python:3.11-alpine
-RUN apk add bash
+
+# when USERNAME=root is provided, the application runs as root within the container, this is useful in case 'pySMART' or any SMART attribute
+# has been configured (smartctl requires root permissions)
+ARG USERNAME=psmqtt
+
+LABEL org.opencontainers.image.source=https://github.com/f18m/psmqtt
+
+RUN apk add bash smartmontools
 
 WORKDIR /opt/psmqtt
 COPY --from=builder /build .
+
+RUN mkdir ./src
 COPY *.py ./
+COPY src/*.py ./src
 COPY psmqtt.service .
 COPY logging.conf .
 
+RUN mkdir ./conf
+COPY psmqtt.conf ./conf
+
 # add user psmqtt to image
-RUN addgroup -S psmqtt && adduser -S psmqtt -G psmqtt
-RUN chown -R psmqtt:psmqtt /opt/psmqtt
+RUN if [[ "$USERNAME" != "root" ]]; then \
+    addgroup -S psmqtt && \
+    adduser -S ${USERNAME} -G psmqtt && \
+    chown -R ${USERNAME}:psmqtt /opt/psmqtt ; \
+    fi
 
 # process run as psmqtt user
-USER psmqtt
+USER ${USERNAME}
 
 # set conf path
 ENV PSMQTTCONFIG="/opt/psmqtt/conf/psmqtt.conf"
diff --git a/README.rst b/README.rst
index 7707224..a050017 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,43 @@
-.. contents:: Table of Contents
+===============
+About this fork
+===============
+
+I created this fork to allow psmqtt to run on my TerraMaster NAS.
+Use it like this::
+
+   docker run -d -v <your config file>:/opt/psmqtt/conf/psmqtt.conf \
+      --privileged --hostname tnas \
+      ghcr.io/f18m/psmqtt:1.0.2
+
+Example of my psmqtt.conf::
+
+   mqtt_broker = '192.168.1.8'       # default: 'localhost'
+   mqtt_username = 'psmqtt'
+   mqtt_password = 'psmqtt'
+   mqtt_clean_session = False
+   mqtt_qos = 0
+   mqtt_retain = False
+   mqtt_request_topic = 'request'
+
+   schedule = {
+      "every 5 sec": [
+         "cpu_percent",
+         "virtual_memory/percent",
+         "sensors_temperatures/rtk_thermal/*",
+         'smart/sdc/temperature',
+         'smart/sdd/temperature',
+      ],
+      "every 60 minutes": "disk_usage/percent/|",  # slash replaced with vertical slash
+      "every 3 hours": {
+         "boot_time/{{x|uptime}}": "uptime",
+      }
+   }
+
+To push a new docker version with architecture arm64, use::
+
+   docker buildx build --platform linux/arm64/v8 --tag ghcr.io/f18m/psmqtt:1.0.2 --build-arg USERNAME=root --push .
+
+(remember to update the tag version)
 
 =======
 Summary
@@ -11,7 +50,7 @@ metrics (CPU, memory, disks, network, smart disk data) to an MQTT broker.
 
 * `paho-mqtt <https://github.com/eclipse/paho.mqtt.python>` to communicate with the MQTT broker;
 * `psutil <https://github.com/giampaolo/psutil>` to collect metrics;
-* `pySMART <https://github.com/jakogut/pySMART>` to collect SMART data;
+* `pySMART <https://github.com/truenas/py-SMART>` to collect SMART data;
 * `recurrent <https://github.com/kvh/recurrent>` to describe reporting schedule.
 * `jinja2 <https://github.com/alex-foundation/jinja2>` to format the data.
 
diff --git a/psmqtt.conf b/psmqtt.conf
index dd3cdea..d966490 100644
--- a/psmqtt.conf
+++ b/psmqtt.conf
@@ -1,3 +1,8 @@
+#
+# PSMQTT configuration file
+# NOTE: this is actually imported as a Python file, so it's using Python syntax
+#
+
 #import socket
 
 mqtt_broker = 'mqtt'       # default: 'localhost'
diff --git a/requirements.txt b/requirements.txt
index 7f40ec2..3234557 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,8 @@
-recurrent
-paho-mqtt
-python-dateutil
-psutil
-jinja2
-types-paho-mqtt
-pySMART
+recurrent>=0.4.1
+paho-mqtt>=1.6.1
+python-dateutil>=2.8.2
+psutil>=5.9.5
+jinja2>=3.1.3
+types-paho-mqtt>=1.6.0.20240321
+# pySMART>=1.3.1.dev8 is required, see https://github.com/truenas/py-SMART/issues/86
+pySMART>=1.3.1.dev8