Multi-arch build

Dockerfile

@@ -1,4 +1,19 @@
-FROM restic/restic:0.15.1
-RUN apk add --no-cache jq curl
+FROM golang:1.19-alpine AS builder
 
-ENTRYPOINT ["/usr/local/bin/backup.sh"]
+ENV RESTIC_VERSION 0.15.1
+
+RUN apk add --no-cache git
+RUN git clone --depth 1 --branch v${RESTIC_VERSION} https://github.com/restic/restic.git /go/src/github.com/restic/restic
+
+WORKDIR /go/src/github.com/restic/restic
+
+RUN go mod download
+RUN go run build.go
+
+FROM alpine:latest AS restic
+
+RUN apk add --update --no-cache ca-certificates fuse openssh-client tzdata jq curl
+
+COPY --from=builder /go/src/github.com/restic/restic/restic /usr/bin
+
+ENTRYPOINT ["/usr/bin/restic"]