Add Dockerfile

Dockerfile

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+FROM golang:1.22-bookworm AS builder
+
+WORKDIR /build
+
+RUN apt update && apt install -y pkg-config cmake
+
+# Cache modules and git2go build
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Build git2go
+RUN git clone https://github.com/libgit2/git2go vendor/github.com/libgit2/git2go/v34
+RUN cd vendor/github.com/libgit2/git2go/v34 && git checkout v34.0.0 && git submodule update --init && make install-static
+RUN mv vendor/github.com/libgit2/git2go/v34 git2go
+
+# Copy the code
+COPY .git main.go ./
+COPY splitter splitter/
+RUN go mod vendor
+RUN rm -rf vendor/github.com/libgit2/git2go/v34
+RUN mv git2go vendor/github.com/libgit2/git2go/v34
+
+# Build
+RUN go build -tags static -ldflags="-s -w -X 'main.version=$(git describe --tags)'" -o splitsh-lite ./main.go
+
+# Prepare files for the final image
+WORKDIR /dist
+RUN cp /build/splitsh-lite ./splitsh-lite
+
+# Add dependent libraries
+RUN ldd splitsh-lite | tr -s '[:blank:]' '\n' | grep '^/' | xargs -I % sh -c 'mkdir -p $(dirname ./%); cp % ./%;'
+
+# Create the runtime image
+FROM scratch
+
+COPY --from=builder /dist /
+ENTRYPOINT ["./splitsh-lite"]