Alpine Dockerfile with Lua

g3proxy/docker/lua.alpine.Dockerfile

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+FROM nickblah/lua:5.4-luarocks-alpine AS lua
+RUN apk add --no-cache build-base
+# install lua modules here.
+# dkjson is just an example.
+# beware: lua's c modules (e.g. cjson)
+# need to be statically linked
+# and won't work when installing in
+# alpine via luarocks. 
+RUN luarocks install dkjson
+
+FROM rust:alpine AS builder
+WORKDIR /usr/src/g3
+COPY . .
+RUN apk add --no-cache musl-dev cmake capnproto-dev openssl-dev c-ares-dev lua5.4-dev pkgconfig
+ENV PKG_CONFIG_PATH=/usr/lib/pkgconfig
+ENV RUSTFLAGS="-Ctarget-feature=-crt-static"
+RUN cargo build --profile release-lto \
+ --no-default-features --features quic,c-ares,hickory,lua54 \
+ -p g3proxy -p g3proxy-ctl -p g3proxy-lua
+
+FROM alpine:latest
+# install dynamic libs
+RUN apk add --no-cache ca-certificates libgcc c-ares lua5.4-libs
+# Copy Lua binaries and modules from the lua stage
+COPY --from=lua /usr/local/bin/lua /usr/local/bin/lua
+COPY --from=lua /usr/local/bin/luarocks /usr/local/bin/luarocks
+COPY --from=lua /usr/local/lib/lua /usr/local/lib/lua
+COPY --from=lua /usr/local/share/lua /usr/local/share/lua
+COPY --from=lua /usr/local/lib/luarocks /usr/local/lib/luarocks
+# Copy the compiled binaries from the builder stage
+COPY --from=builder /usr/src/g3/target/release-lto/g3proxy /usr/bin/g3proxy
+COPY --from=builder /usr/src/g3/target/release-lto/g3proxy-ctl /usr/bin/g3proxy-ctl
+COPY --from=builder /usr/src/g3/target/release-lto/g3proxy-lua /usr/bin/g3proxy-lua
+ENTRYPOINT ["/usr/bin/g3proxy"]
+CMD ["-Vvv"]