From 0d2d1b90c8bf6be11826520bb56321127aaeba1b Mon Sep 17 00:00:00 2001
From: Vorezal <37914382+vorezal@users.noreply.github.com>
Date: Sat, 31 Jan 2026 17:53:26 +0000
Subject: [PATCH 1/4] Docker configuration

---
 .gitignore           |  7 ++++++-
 Dockerfile           | 25 +++++++++++++++++++++++++
 compose-example.yaml | 14 ++++++++++++++
 entrypoint.sh        | 26 ++++++++++++++++++++++++++
 4 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 Dockerfile
 create mode 100644 compose-example.yaml
 create mode 100644 entrypoint.sh

diff --git a/.gitignore b/.gitignore
index 182c4aa..f490fe8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,9 @@ regctl
 # ignore snooze file
 snooze.list
 # ignore updates file
-updates_available.txt
\ No newline at end of file
+updates_available.txt
+# ignore user compose files
+compose.yaml
+compose.yml
+docker-compose.yaml
+docker-compose.yml
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..f5cab9e
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,25 @@
+# Use an official Alpine image as a base
+FROM alpine:latest
+
+WORKDIR /app
+
+# Install apps
+RUN apk update && apk add --no-cache bash curl docker-cli docker-cli-compose supercronic jq regclient msmtp --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing/
+
+# Copy the script files into the container
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY dockcheck.sh /app/dockcheck.sh
+COPY urls.list /app/urls.list
+COPY notify_templates /app/notify_templates
+COPY extras /app/extras
+COPY addons /app/addons
+
+# Create symlink, give execution rights on the script and set proper permissions
+RUN ln -s /app/dockcheck.sh /usr/local/bin/dockcheck.sh
+RUN chmod +x /usr/local/bin/dockcheck.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+
+# Run the cron daemon in the foreground and tail the log file to keep the container running
+CMD ["supercronic", "/app/crontab"]
diff --git a/compose-example.yaml b/compose-example.yaml
new file mode 100644
index 0000000..fb86825
--- /dev/null
+++ b/compose-example.yaml
@@ -0,0 +1,14 @@
+services:
+  dockcheck:
+    image: dockcheck:latest
+    restart: unless-stopped
+    environment:
+      CRON_SCHEDULE: "0 * * * *"
+      DOCKCHECK_ARGS: "-mniI -x 10"
+      CRON_SCHEDULE_1: "30 1 * * *"
+      DOCKCHECK_ARGS_1: "-milap -x 1"
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+      - /var/run/docker.sock:/var/run/docker.sock
+      - ./dockcheck.config:/app/dockcheck.config
+      - /path/to/projects/docker:/path/to/projects/docker:ro
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..eda57e3
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# Exit immediately if a command exits with a non-zero status
+set -e
+
+# If the CRON_SCHEDULE and DOCKCHECK_ARGS environment variables are set, create the crontab entry for the dockcheck user
+if [ -n "$CRON_SCHEDULE" ] && [ -n "$DOCKCHECK_ARGS" ]; then
+  # Write the environment variable content to a temporary file, ensuring a newline at the end
+  echo "$CRON_SCHEDULE" /app/dockcheck.sh "$DOCKCHECK_ARGS" > /app/crontab
+
+  # Support additional schedule variables
+  for schedule_var in "${!CRON_SCHEDULE_@}"; do
+    suffix="${schedule_var#CRON_SCHEDULE_}"
+    schedule_value="${!schedule_var}"
+    args_var="DOCKCHECK_ARGS_${suffix}"
+    args_value="${!args_var}"
+    echo "$schedule_value" /app/dockcheck.sh "$args_value" >> /app/crontab
+  done
+
+  echo "Crontab created."
+else
+  echo "No CRON_SCHEDULE or DOCKCHECK_ARGS environment variable(s) found. No crontab created."
+fi
+
+# Pass control to the CMD command specified in the Dockerfile
+exec "$@"

From 867b14d4091e796a365f7c6fa2f326a106e79a33 Mon Sep 17 00:00:00 2001
From: Vorezal <37914382+vorezal@users.noreply.github.com>
Date: Tue, 3 Feb 2026 02:27:49 +0000
Subject: [PATCH 2/4] Adjust script paths and support run on startup

---
 Dockerfile    | 11 +++++------
 entrypoint.sh | 15 +++++++++++++--
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index f5cab9e..ac1111a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ WORKDIR /app
 RUN apk update && apk add --no-cache bash curl docker-cli docker-cli-compose supercronic jq regclient msmtp --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing/
 
 # Copy the script files into the container
-COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY entrypoint.sh /app/entrypoint.sh
 COPY dockcheck.sh /app/dockcheck.sh
 COPY urls.list /app/urls.list
 COPY notify_templates /app/notify_templates
@@ -15,11 +15,10 @@ COPY extras /app/extras
 COPY addons /app/addons
 
 # Create symlink, give execution rights on the script and set proper permissions
-RUN ln -s /app/dockcheck.sh /usr/local/bin/dockcheck.sh
-RUN chmod +x /usr/local/bin/dockcheck.sh
-RUN chmod +x /usr/local/bin/entrypoint.sh
+RUN chmod +x /app/dockcheck.sh
+RUN chmod +x /app/entrypoint.sh
 
-ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+ENTRYPOINT ["/app/entrypoint.sh"]
 
 # Run the cron daemon in the foreground and tail the log file to keep the container running
-CMD ["supercronic", "/app/crontab"]
+CMD ["supercronic", "-passthrough-logs", "-json", "/app/crontab"]
diff --git a/entrypoint.sh b/entrypoint.sh
index eda57e3..f67e013 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -6,7 +6,12 @@ set -e
 # If the CRON_SCHEDULE and DOCKCHECK_ARGS environment variables are set, create the crontab entry for the dockcheck user
 if [ -n "$CRON_SCHEDULE" ] && [ -n "$DOCKCHECK_ARGS" ]; then
   # Write the environment variable content to a temporary file, ensuring a newline at the end
-  echo "$CRON_SCHEDULE" /app/dockcheck.sh "$DOCKCHECK_ARGS" > /app/crontab
+  echo "$CRON_SCHEDULE" /app/dockcheck.sh $DOCKCHECK_ARGS > /app/crontab
+
+  if [ -n "$DOCKCHECK_ONSTART" ]; then
+    echo "Executing: dockcheck $DOCKCHECK_ARGS"
+    /app/dockcheck.sh $DOCKCHECK_ARGS
+  fi
 
   # Support additional schedule variables
   for schedule_var in "${!CRON_SCHEDULE_@}"; do
@@ -14,7 +19,13 @@ if [ -n "$CRON_SCHEDULE" ] && [ -n "$DOCKCHECK_ARGS" ]; then
     schedule_value="${!schedule_var}"
     args_var="DOCKCHECK_ARGS_${suffix}"
     args_value="${!args_var}"
-    echo "$schedule_value" /app/dockcheck.sh "$args_value" >> /app/crontab
+    echo "$schedule_value" /app/dockcheck.sh $args_value >> /app/crontab
+
+    onstart_var="DOCKCHECK_ONSTART_${suffix}"
+    if [ -n "${!onstart_var}" ]; then
+      echo "Executing: dockcheck $args_value"
+      /app/dockcheck.sh $args_value
+    fi
   done
 
   echo "Crontab created."

From 3e5a0e1a1a87d9692412ba05c4d226ba37fc76fa Mon Sep 17 00:00:00 2001
From: Vorezal <37914382+vorezal@users.noreply.github.com>
Date: Sat, 14 Mar 2026 01:25:00 +0000
Subject: [PATCH 3/4] Use optional volume instead of building with urls.list.
 Add comments to compose-example.yaml.

---
 Dockerfile           | 1 -
 compose-example.yaml | 3 ++-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index ac1111a..82c35cb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,6 @@ RUN apk update && apk add --no-cache bash curl docker-cli docker-cli-compose sup
 # Copy the script files into the container
 COPY entrypoint.sh /app/entrypoint.sh
 COPY dockcheck.sh /app/dockcheck.sh
-COPY urls.list /app/urls.list
 COPY notify_templates /app/notify_templates
 COPY extras /app/extras
 COPY addons /app/addons
diff --git a/compose-example.yaml b/compose-example.yaml
index fb86825..82e7587 100644
--- a/compose-example.yaml
+++ b/compose-example.yaml
@@ -11,4 +11,5 @@ services:
       - /etc/localtime:/etc/localtime:ro
       - /var/run/docker.sock:/var/run/docker.sock
       - ./dockcheck.config:/app/dockcheck.config
-      - /path/to/projects/docker:/path/to/projects/docker:ro
+      - /path/to/projects/docker:/path/to/projects/docker:ro # add a volume (or volumes, if needed) mapping your Docker project directories to the container
+      - ./urls.list/:/app/urls.list # optional volume to enable displaying releasenote urls

From 060afaa079b03d09d8e898ef8d5a6fef846fe414 Mon Sep 17 00:00:00 2001
From: Robin Ivehult <robin.ivehult@gmail.com>
Date: Tue, 17 Mar 2026 08:58:51 +0100
Subject: [PATCH 4/4] added hostname+container_name

---
 compose-example.yaml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/compose-example.yaml b/compose-example.yaml
index 82e7587..034eeb2 100644
--- a/compose-example.yaml
+++ b/compose-example.yaml
@@ -1,6 +1,9 @@
 services:
   dockcheck:
-    image: dockcheck:latest
+    container_name: dockcheck
+    hostname: dockerHostXYZ # The name that will be used in notifications
+    build: . # Currently building locally for testing before publishing
+    # image: dockcheck:latest
     restart: unless-stopped
     environment:
       CRON_SCHEDULE: "0 * * * *"
@@ -12,4 +15,4 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock
       - ./dockcheck.config:/app/dockcheck.config
       - /path/to/projects/docker:/path/to/projects/docker:ro # add a volume (or volumes, if needed) mapping your Docker project directories to the container
-      - ./urls.list/:/app/urls.list # optional volume to enable displaying releasenote urls
+      - ./urls.list/:/app/urls.list # optional volume to enable displaying releasenote urls, can also reference the `./notify_templates/urls.list`