fix(dockerfile): install rustic in Dockerfile build

Author: naterfute

Dockerfile

@@ -2,18 +2,35 @@
 FROM golang:1.24-alpine AS builder
 
 ARG VERSION
+ARG RUSTIC_VERSION=0.10.0
+ARG TARGETARCH
 RUN apk add --update --no-cache git make mailcap curl bash
 WORKDIR /app/
 COPY go.mod go.sum /app/
 RUN go mod download
 COPY . /app/
-RUN make download-rustic
+
+RUN case "$TARGETARCH" in \
+	amd64) \
+	ASSET="rustic-v${RUSTIC_VERSION}-x86_64-unknown-linux-musl.tar.gz" \
+	;; \
+	arm64) \
+	ASSET="rustic-v${RUSTIC_VERSION}-aarch64-unknown-linux-musl.tar.gz" \
+	;; \
+	*) \
+	echo "Unsupported architecture: $TARGETARCH"; exit 1 \
+	;; \
+	esac && \
+	mkdir -p /tmp/rustic && \
+	curl -L https://github.com/rustic-rs/rustic/releases/download/v${RUSTIC_VERSION}/${ASSET} | tar -zx -C /tmp/rustic
+
+
 RUN CGO_ENABLED=0 go build \
-    -ldflags="-s -w -X github.com/pyrohost/elytra/src/system.Version=$VERSION" \
-    -v \
-    -trimpath \
-    -o elytra \
-    ./src/cmd/elytra
+	-ldflags="-s -w -X github.com/pyrohost/elytra/src/system.Version=$VERSION" \
+	-v \
+	-trimpath \
+	-o elytra \
+	./src/cmd/elytra
 RUN echo "ID=\"distroless\"" > /etc/os-release
 
 # Stage 2 (Final)
@@ -22,6 +39,7 @@ COPY --from=builder /etc/os-release /etc/os-release
 COPY --from=builder /etc/mime.types /etc/mime.types
 
 COPY --from=builder /app/elytra /usr/bin/
+COPY --from=builder /tmp/rustic/rustic /usr/bin/
 
 ENTRYPOINT ["/usr/bin/elytra"]
 CMD ["--config", "/etc/elytra/config.yml"]