add dockerfile with static build and example compose file

Signed-off-by: Daniel Thamdrup <[email protected]>

Dockerfile

@@ -0,0 +1,34 @@
+# syntax=docker/dockerfile:latest
+FROM scratch AS src
+COPY . /src
+
+FROM alpine:latest AS build
+RUN --mount=type=bind,readwrite,from=src,source=/src,target=/src \
+    apk add \
+        alpine-sdk \
+        clang \
+        cmake \
+        libuv-dev \
+        libuv-static \
+        lld \
+        openssl-dev \
+        openssl-libs-static \
+        samurai && \
+    cmake \
+        -S /src \
+        -B /src/build \
+        -G Ninja \
+        -D BUILD_STATIC=ON \
+        -D CMAKE_BUILD_TYPE=Release \
+        -D CMAKE_C_COMPILER=clang \
+        -D CMAKE_CXX_COMPILER=clang++ \
+        -D CMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld -static -static-libgcc -static-libstdc++" \
+        -D OPENSSL_USE_STATIC_LIBS=ON \
+        -D WITH_HTTP=ON \
+        -D WITH_TLS=ON && \
+    cmake --build /src/build && \
+    mv /src/build/xmrig-proxy /xmrig-proxy
+
+FROM scratch AS runtime
+COPY --from=build /xmrig-proxy /xmrig-proxy
+ENTRYPOINT [ "/xmrig-proxy" ]