fix: simplify docker build to use pre-built binary

Author: larkinwc

.goreleaser.yml

@@ -76,12 +76,9 @@ dockers:
       - "ghcr.io/larkinwc/proxmox-lxc-compose:{{ .Version }}"
       - "ghcr.io/larkinwc/proxmox-lxc-compose:latest"
     dockerfile: Dockerfile
-    extra_files:
-      - go.mod
-      - go.sum
-      - cmd/
-      - pkg/
+    use: buildx
     build_flag_templates:
+      - "--platform=linux/amd64"
       - "--label=org.opencontainers.image.created={{.Date}}"
       - "--label=org.opencontainers.image.title={{.ProjectName}}"
       - "--label=org.opencontainers.image.revision={{.FullCommit}}"

Dockerfile

@@ -1,19 +1,7 @@
-FROM golang:1.21-alpine AS builder
-
-WORKDIR /app
-
-# Copy go mod files first for better layer caching
-COPY go.mod go.sum ./
-RUN go mod download
-
-# Copy the rest of the source code
-COPY . .
-RUN CGO_ENABLED=0 GOOS=linux go build -o lxc-compose ./cmd/lxc-compose
-
 FROM alpine:latest
 
 RUN apk add --no-cache lxc docker-cli
 
-COPY --from=builder /app/lxc-compose /usr/local/bin/
+COPY lxc-compose /usr/local/bin/
 
 ENTRYPOINT ["lxc-compose"]