feat: add arm64 support for docker image (#31)

Author: adamtagscherer

.github/workflows/reusable-build-and-push.yml

@@ -62,6 +62,7 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           tags: ghcr.io/openclarity/grype-server:${{ inputs.image_tag }}
           file: Dockerfile
           push: ${{ inputs.push }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20.4-alpine AS builder
+FROM --platform=$BUILDPLATFORM golang:1.20.4-alpine AS builder
 
 RUN apk add --update --no-cache gcc g++
 
@@ -11,7 +11,11 @@ RUN go mod download
 
 # Copy and build backend code
 COPY grype-server .
-RUN go build -o grype-server ./cmd/grype-server/main.go
+
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o grype-server ./cmd/grype-server/main.go
 
 FROM alpine:3.17