Added local Dockerfile for lightwalletd until CI is setup

lightwalletd/Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.13 AS lightwalletd_base
+ARG LWD_TAG=v0.3.0
+
+RUN git clone --depth 1 \
+  https://github.com/zcash/lightwalletd.git \
+  /go/src/github.com/zcash/lightwalletd
+WORKDIR /go/src/github.com/zcash/lightwalletd
+RUN git checkout ${LWD_TAG}
+RUN make
+
+FROM debian:10
+
+COPY --from=lightwalletd_base \
+  /go/src/github.com/zcash/lightwalletd/server \
+  /usr/bin/server
+
+ARG LWD_USER=lightwalletd
+ARG LWD_UID=2002
+
+RUN useradd --home-dir /srv/$LWD_USER \
+            --shell /bin/bash \
+            --create-home \
+            --uid $LWD_UID\
+            $LWD_USER
+USER $LWD_USER
+WORKDIR /srv/$LWD_USER
+
+ENTRYPOINT ["server"]
+CMD ["--help"]