Add arm64v8 build

dockerfile/arm64v8/Dockerfile

@@ -0,0 +1,20 @@
+#
+# Alpine image to get some needed data
+#
+FROM alpine:latest as alpine
+RUN apk add --no-cache \
+    ca-certificates \
+    tzdata
+
+#
+# Image
+#
+FROM scratch
+LABEL "com.centurylinklabs.watchtower"="true"
+
+# copy files from other containers
+COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=alpine /usr/share/zoneinfo /usr/share/zoneinfo
+
+COPY watchtower /
+ENTRYPOINT ["/watchtower"]

dockerfile/push_containers.sh

@@ -49,4 +49,5 @@ push_all() {
 
 IMAGE_NAME=v2tec/watchtower
 push_all ${IMAGE_NAME}:
-push_all ${IMAGE_NAME}:armhf-
+push_all ${IMAGE_NAME}:armhf-
+push_all ${IMAGE_NAME}:arm64v8-

goreleaser.yml

@@ -17,6 +17,7 @@ build:
   goarch:
     - amd64
     - arm
+    - arm64
 
 # Archive customization
 archive:
@@ -35,6 +36,7 @@ archive:
   # of `uname -s` and `uname -m` respectively.
   replacements:
     arm: armhf
+    arm64: arm64v8
     amd64: amd64
     386: 386
     darwin: macOS
@@ -68,4 +70,13 @@ dockers:
     image: v2tec/watchtower
     dockerfile: dockerfile/armhf/Dockerfile
     tag_templates:
-      - 'armhf-{{ .Version }}'
+      - 'armhf-{{ .Version }}'
+  -
+    goos: linux
+    goarch: arm64
+    goarm: ''
+    binary: watchtower
+    image: v2tec/watchtower
+    dockerfile: dockerfile/arm64v8/Dockerfile
+    tag_templates:
+      - 'arm64v8-{{ .Version }}'