prepare for dockerizing

Dockerfile

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+FROM alpine:3.13 AS builder
+
+ARG VERSION
+
+COPY sink/ /tmp/sink
+
+RUN \
+  apk update && \
+  apk add alpine-sdk && \
+  apk add libconfig-dev && \
+  apk add postgresql-dev && \
+  cd /tmp/sink && \
+  make VERSION=${VERSION}
+
+
+FROM alpine:3.13
+
+COPY --from=builder /tmp/sink/build/sink20169 /usr/local/bin/
+
+RUN \
+  apk add --no-cache libpq && \
+  apk add --no-cache libconfig && \
+  mkdir /etc/sink
+
+EXPOSE 20169/udp
+
+VOLUME /etc/sink
+
+CMD [ "/usr/local/bin/sink20169", "-f", "/etc/sink/sink20169.cfg", "-n", "nobody", "-v" ]
+
+  
+
+
+