chore(ci): set image platform on image build (#811)

Co-authored-by: Simon Aronsson <simme@arcticbit.se>

.github/workflows/pull-request.yml

@@ -69,5 +69,5 @@ jobs:
       - name: Build
         uses: goreleaser/goreleaser-action@v2
         with:
-          version: v0.104.1
+          version: v0.155.0
           args: --snapshot --skip-publish --debug

.github/workflows/release.yml

@@ -70,10 +70,10 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: 1.15.x
-      - name: Run goreleaser
+      - name: Build
         uses: goreleaser/goreleaser-action@v2
         with:
-          version: v0.104.1
+          version: v0.155.0
           args: --debug
       - name: Enable experimental docker features
         run: |

dockerfiles/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.11 as alpine
+FROM --platform=$BUILDPLATFORM alpine:3.11 as alpine
 
 RUN apk add --no-cache \
     ca-certificates \

goreleaser.yml

@@ -9,23 +9,26 @@ build:
     - 386
     - arm
     - arm64
-archive:
-  name_template: "{{.ProjectName}}_{{.Os}}_{{.Arch}}"
-  format: tar.gz
-  replacements:
-    arm: armhf
-    arm64: arm64v8
-    amd64: amd64
-    386: 386
-    darwin: macOS
-    linux: linux
-  format_overrides:
-    - goos: windows
-      format: zip
-  files:
-    - LICENSE.md
+archives:
+  - 
+    name_template: "{{.ProjectName}}_{{.Os}}_{{.Arch}}"
+    format: tar.gz
+    replacements:
+      arm: armhf
+      arm64: arm64v8
+      amd64: amd64
+      386: 386
+      darwin: macOS
+      linux: linux
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - LICENSE.md
 dockers:
   -
+    use_buildx: true
+    build_flag_templates: [ "--platform=linux/amd64" ]
     goos: linux
     goarch: amd64
     goarm: ''
@@ -36,6 +39,8 @@ dockers:
     binaries:
       - watchtower
   - 
+    use_buildx: true
+    build_flag_templates: [ "--platform=linux/386" ]
     goos: linux
     goarch: 386
     goarm: ''
@@ -46,6 +51,8 @@ dockers:
     binaries:
       - watchtower
   - 
+    use_buildx: true
+    build_flag_templates: [ "--platform=linux/arm/v6" ]
     goos: linux
     goarch: arm
     goarm: 6
@@ -56,6 +63,8 @@ dockers:
     binaries:
       - watchtower
   - 
+    use_buildx: true
+    build_flag_templates: [ "--platform=linux/arm64/v8" ]
     goos: linux
     goarch: arm64
     goarm: ''