use restic as base image

.github/dependabot.yml

@@ -0,0 +1,8 @@
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"

Dockerfile

@@ -6,7 +6,8 @@ RUN go mod download
 COPY . .
 RUN go build
 
-FROM alpine
+FROM restic/restic:0.14.0
-RUN apk add --no-cache restic rclone bash openssh
+RUN apk add --no-cache rclone bash
 COPY --from=builder /app/autorestic /usr/bin/autorestic
+ENTRYPOINT []
 CMD [ "autorestic" ]