Add initial implementation of two-tone detector with Docker support

Dockerfile

@@ -0,0 +1,34 @@
+# builder
+FROM golang:alpine AS builder
+
+WORKDIR /app
+ADD . /app
+
+RUN CGO_ENABLED=0 go build -o two-tone-detector
+
+# runner
+FROM alpine:latest
+
+WORKDIR /app
+COPY --from=builder /app/two-tone-detector /app/two-tone-detector
+
+# Metadata params
+ARG VERSION
+ARG BUILD_DATE
+ARG NAME
+ARG VENDOR
+
+# Metadata
+LABEL org.label-schema.build-date=$BUILD_DATE \
+org.label-schema.url="https://alex.savin.nyc" \
+org.label-schema.docker.schema-version="1.0"
+#      org.label-schema.name=$NAME \
+#      org.label-schema.description="Example of multi-stage docker build" \
+#      org.label-schema.vcs-url=https://github.com/alex-savin/$VCS_URL \
+#      org.label-schema.vcs-ref=$VCS_REF \
+#      org.label-schema.vendor=$VENDOR \
+#      org.label-schema.version=$VERSION \
+
+VOLUME /app/config
+
+CMD ["./two-tone-detector"]