ci: add Docker build cache

Author: pan93412

.github/workflows/docker.yaml

@@ -54,6 +54,8 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
 
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@main

Dockerfile

@@ -3,11 +3,13 @@ RUN mkdir /src
 WORKDIR /src
 
 COPY go.mod go.sum* ./
-RUN go mod download
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
 COPY . /src/
-ENV CGO_ENABLED=0
 
-RUN go build -o ./bin/server
+ENV CGO_ENABLED=0
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go build -ldflags="-s -w" -trimpath -o ./bin/server
 
 FROM alpine AS runtime
 LABEL org.opencontainers.image.source="https://github.com/database-playground/sqlrunner-v2"