Update deps

Author: RafhaanShah

.dockerignore

@@ -1,5 +1,5 @@
 *
 
-!app.go
+!*.go
 !go.mod
 !go.sum

.github/dependabot.yml

@@ -13,3 +13,11 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "docker-compose"
+    directory: "/"
+    schedule:
+      interval: "monthly"

.github/workflows/build_and_test.yml

@@ -19,10 +19,15 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v5
       with:
-        go-version: 1.18
         check-latest: true
         cache: true
 
+    - name: Check format
+      run: |
+        if [ "$(gofmt -s -l . | wc -l)" -gt 0 ]; then
+            exit 1
+        fi
+
     - name: Build
       run: go build -v app.go
 

.github/workflows/codeql-analysis.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v2.4.0
+        uses: dependabot/fetch-metadata@v2
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 

.github/workflows/dependabot_updates.yml

@@ -17,11 +17,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Set version variable
-      id: version
+      # checkout is NOT needed for docker/build-push-action
+    
+    - name: Set version variables
+      id: vars
       run: |
-        echo "tag=${GITHUB_REF#refs/*/}"
-        echo "tag=${GITHUB_REF#refs/*/}" >> $GITHUB_OUTPUT
+        TAG=${GITHUB_REF#refs/*/}
+        MAJOR=$(echo $TAG | grep -oP '^v\d+')
+        MINOR=$(echo $TAG | grep -oP '^v\d+\.\d+')
+        PATCH=$TAG
+        echo "major=$MAJOR" >> $GITHUB_OUTPUT
+        echo "minor=$MINOR" >> $GITHUB_OUTPUT
+        echo "patch=$PATCH" >> $GITHUB_OUTPUT
       
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3
@@ -42,8 +49,12 @@ jobs:
       with:
         platforms: linux/amd64,linux/arm64,linux/arm/v7
         push: true
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
         tags: |
-          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}
+          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.vars.outputs.major }}
+          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.vars.outputs.minor }}
+          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.vars.outputs.patch }}
           ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
 
     - name: Print image digest

.github/workflows/publish.yml

@@ -1 +1,3 @@
-app
+.vscode/
+app
+container-mon

.gitignore

@@ -1,15 +1,18 @@
 # Build the app
-FROM golang:1.24-alpine AS build
+# https://docs.docker.com/build/building/multi-platform/#cross-compiling-a-go-application
+FROM --platform=$BUILDPLATFORM golang:1.25-alpine AS build
+ARG TARGETOS
+ARG TARGETARCH
 
 WORKDIR /build
 COPY . .
-RUN go build app.go
+RUN RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o container-mon
 
 # Run the app
-FROM alpine:latest
+FROM alpine:3
 
-LABEL org.opencontainers.image.source https://github.com/RafhaanShah/Container-Mon
+LABEL org.opencontainers.image.source=https://github.com/RafhaanShah/Container-Mon
 
 WORKDIR /app
-COPY --from=build /build/app /app
-ENTRYPOINT ["./app"]
+COPY --from=build /build/container-mon /app
+ENTRYPOINT ["./container-mon"]

Dockerfile

@@ -6,9 +6,18 @@ Get notified when your [Docker](https://www.docker.com/) containers are unhealth
 ![](/assets/screenshot.jpg)
 
 ## Prerequisites
-- Have [Go](https://golang.org/) 1.18+ or [Docker](https://www.docker.com/) installed
 - A notification service supported by [Shoutrrr](https://containrrr.dev/shoutrrr/services/overview/) and the required API keys or other configuration for your chosen service (e.g: Telegram, Discord, Slack, Teams etc)
 
+## Building
+Build the app:
+```
+go build
+```
+Format:
+```
+gofmt -w .
+```
+
 ## Configuration
 All configuration is done via environment variables, see the table below for all options and default values. Only `CONTAINERMON_NOTIFICATION_URL` is mandatory, all other fields are optional.
 | Name                            | Type   | Default Value         | Description                                                                                                                                                                  |
@@ -30,14 +39,14 @@ All configuration is done via environment variables, see the table below for all
 - Stand-alone:
 	`go run app.go`
 - Docker:
-  ```
-	docker run \
-	-v /var/run/docker.sock:/var/run/docker.sock \
-	-e CONTAINERMON_NOTIFICATION_URL=telegram://token@telegram?channels=channel-1 \
-	ghcr.io/rafhaanshah/container-mon:latest
+  ```shell
+  docker run \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    -e CONTAINERMON_NOTIFICATION_URL=telegram://token@telegram?channels=channel-1 \
+    ghcr.io/rafhaanshah/container-mon:latest
   ```
 - Docker-Compose:
-  ```
+  ```yaml
   version: "3.8"
     services:
       container-mon:

README.md

@@ -131,7 +131,7 @@ func getContainers(ctx context.Context, cli *client.Client, filterByLabel bool,
 
 func isHealthy(ctx context.Context, cli *client.Client, c types.Container, conf config) bool {
 	running := c.State == "running"
-	
+
 	containerJSON, err := cli.ContainerInspect(ctx, c.ID)
 	if conf.checkContainerExitCode && c.State == "exited" {
 		// If the container is stopped ("exited"), we need to inspect it to get the exit code.
@@ -152,7 +152,7 @@ func isHealthy(ctx context.Context, cli *client.Client, c types.Container, conf
 	}
 
 	healthy := health.Status == types.Healthy
-	return healthy 	
+	return healthy
 }
 
 func getConfig() config {