32bit support

dockerfile/386/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"]

goreleaser.yml

@@ -6,6 +6,7 @@ build:
     - windows
   goarch:
     - amd64
+    - 386
     - arm
     - arm64
 archive:
@@ -35,6 +36,15 @@ dockers:
       - containrrr/watchtower:{{ .Version }}
     binaries:
       - watchtower
+  -
+    goos: linux
+    goarch: 386
+    goarm: ''
+    binary: watchtower
+    image: v2tec/watchtower
+    dockerfile: dockerfile/386/Dockerfile
+    tag_templates:
+      - '386-{{ .Version }}'
   -
     goos: linux
     goarch: arm