Merge pull request #4 from tejastn10/feat/optimize-image

Feat: Optimize Docker image

.github/workflows/docker-image.yml

@@ -0,0 +1,37 @@
+name: Build and Publish Docker Image
+
+on:
+  push:
+    tags:
+      - "v*.*.*" # Trigger the workflow when a version tag is pushed
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the code
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Set up Docker Buildx
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      # Log in to Docker Hub using secrets (DOCKER_USERNAME and DOCKER_PASSWORD
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      # Build and push the Docker image with both version and latest tags
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64 # Build only for amd64
+          tags: |
+            tejastn10/argus:latest
+            tejastn10/argus:${{ github.ref_name }}

Dockerfile

@@ -1,18 +1,30 @@
-# Start with the official Go image
-FROM golang:1.23
+# Stage 1: Build the application
+FROM golang:1.23 as builder
 
-# Set the working directory
+# Set the working directory inside the builder stage
 WORKDIR /app
 
 # Copy the Go module files and download dependencies
 COPY go.mod go.sum ./
 RUN go mod download
 
-# Copy the application code
+# Copy the application source code
 COPY . .
 
-# Build the Go application
-RUN go build -o argus
+# Build the Go application statically
+RUN CGO_ENABLED=0 GOOS=linux go build -o argus
 
-# Set the default command
+# Stage 2: Create a lightweight runtime image
+FROM alpine:latest
+
+# Install certificates for HTTPS support
+RUN apk add --no-cache ca-certificates
+
+# Set the working directory inside the runtime image
+WORKDIR /root/
+
+# Copy the binary from the builder stage
+COPY --from=builder /app/argus .
+
+# Set the default command to run the binary
 CMD ["./argus"]