ci: Cache layers in Docker build

.github/workflows/release.yml

@@ -33,6 +33,8 @@ jobs:
         with:
           context: .
           push: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
           platforms: linux/arm64
           # Disable provenance to prevent multi-platform index with unused layers like `unknown/unknown`
           # https://github.com/docker/buildx/issues/1509#issuecomment-1378538197

Dockerfile

@@ -2,12 +2,14 @@
 
 FROM golang:1.23-alpine AS builder
 WORKDIR /builder-dir
+COPY go.mod go.sum ./ 
+RUN go mod download
 COPY . ./
 ENV CGO_ENABLED=1
 RUN apk add --no-cache git build-base sqlite 
 RUN go mod download
 RUN BUILD_TIME=$(date +"%Y-%m-%dT%H:%M:%S%z") && \
-   GIT_COMMIT=$(git describe --always --dirty) && \
+   GIT_COMMIT=$(git rev-parse --short HEAD) && \
    go build -ldflags="-s -X main.commitSha=$GIT_COMMIT -X main.buildTime=$BUILD_TIME" -o bin cmd/server/main.go
 
 FROM alpine:latest
@@ -17,4 +19,3 @@ COPY --from=builder /builder-dir/bin bin
 COPY --from=builder /builder-dir/internal/db/migrations internal/db/migrations
 EXPOSE 3001
 CMD ["./bin/main"]
-