update the base image for docker iamges to ubuntu:latest - which follows the LTS.

fixes #274

docker/Dockerfile

@@ -26,14 +26,14 @@ RUN npm install -g @angular/cli@9.1.4 && \
 
 
 ########
-FROM ubuntu:bionic as runtime
+FROM ubuntu:latest as runtime
 ARG TARGETARCH
 EXPOSE 8080
 WORKDIR /opt/scrutiny
 ENV PATH="/opt/scrutiny/bin:${PATH}"
 ENV INFLUXD_CONFIG_PATH=/opt/scrutiny/influxdb
 
-RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates curl tzdata \
+RUN apt-get update && apt-get install -y cron smartmontools ca-certificates curl tzdata \
     && update-ca-certificates \
     &&  case ${TARGETARCH} in \
             "amd64")  S6_ARCH=amd64  ;; \

docker/Dockerfile.collector

@@ -10,11 +10,11 @@ RUN go mod vendor && \
     go build -ldflags '-w -extldflags "-static"' -o scrutiny-collector-metrics collector/cmd/collector-metrics/collector-metrics.go
 
 ########
-FROM ubuntu:bionic as runtime
+FROM ubuntu:latest as runtime
 WORKDIR /scrutiny
 ENV PATH="/opt/scrutiny/bin:${PATH}"
 
-RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates tzdata && update-ca-certificates
+RUN apt-get update && apt-get install -y cron smartmontools ca-certificates tzdata && update-ca-certificates
 
 COPY /docker/entrypoint-collector.sh /entrypoint-collector.sh
 COPY /rootfs/etc/cron.d/scrutiny /etc/cron.d/scrutiny

docker/Dockerfile.web

@@ -24,7 +24,7 @@ RUN npm install -g @angular/cli@9.1.4 && \
 
 
 ########
-FROM ubuntu:bionic as runtime
+FROM ubuntu:latest as runtime
 EXPOSE 8080
 WORKDIR /opt/scrutiny
 ENV PATH="/opt/scrutiny/bin:${PATH}"

docs/INSTALL_MANUAL.md

@@ -113,7 +113,8 @@ Unlike the webapp, the collector does have some dependencies:
 Unfortunately the version of `smartmontools` (which contains `smartctl`) available in some of the base OS repositories is ancient.
 So you'll need to install the v7+ version using one of the following commands:
 
-- **Ubuntu:** `apt-get install -y smartmontools=7.0-0ubuntu1~ubuntu18.04.1`
+- **Ubuntu (22.04/Jammy/LTS):** `apt-get install -y smartmontools`
+- **Ubuntu (18.04/Bionic):** `apt-get install -y smartmontools=7.0-0ubuntu1~ubuntu18.04.1`
 - **Centos8:**
     - `dnf install https://extras.getpagespeed.com/release-el8-latest.rpm`
     - `dnf install smartmontools`