refactor: Dockerfile (#34)

Dockerfile

@@ -1,43 +1,33 @@
-# syntax=docker/dockerfile:1.2
+# syntax=docker/dockerfile:1
+
 FROM golang:1.21.5-alpine AS builder
 
 RUN apk add --update --no-cache gcc g++ git ca-certificates build-base
 
-# Copy code
-COPY . /build
-WORKDIR /build
-
 ARG VERSION
 ARG BUILD_TIMESTAMP
 ARG COMMIT_HASH
 ARG TARGETOS
 ARG TARGETARCH
 
+WORKDIR /build
+
 RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=bind,source=.,target=/build,ro \
     GOOS=${TARGETOS} GOARCH=${TARGETARCH} CGO_ENABLED=0 \
     go build \
     -ldflags="-s -w \
         -X 'github.com/openclarity/yara-rule-server/pkg/version.Version=${VERSION}' \
         -X 'github.com/openclarity/yara-rule-server/pkg/version.CommitHash=${COMMIT_HASH}' \
         -X 'github.com/openclarity/yara-rule-server/pkg/version.BuildTimestamp=${BUILD_TIMESTAMP}'" \
-    -o bin/yara-rule-server main.go
-
-
+    -o /bin/yara-rule-server main.go
 
 FROM alpine:3.19
 
-RUN apk upgrade
-RUN apk add util-linux
-RUN apk add yara
-RUN mkdir /etc/yara-rule-server
-
-WORKDIR /app
-
-COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=builder /build/bin/yara-rule-server ./yara-rule-server
-COPY config.example.yaml /etc/yara-rule-server/config.yaml
+RUN apk --no-cache add util-linux yara ca-certificates
 
-WORKDIR /opt
+COPY --from=builder --chmod=755 /bin/yara-rule-server /bin/yara-rule-server
+COPY --link --chmod=644 config.example.yaml /etc/yara-rule-server/config.yaml
 
-ENTRYPOINT ["/app/yara-rule-server"]
+ENTRYPOINT ["/bin/yara-rule-server"]