added publish step, and drone sig for secrets, plus dockerfile

docker/Dockerfile

@@ -0,0 +1,23 @@
+# Multi-stage build form
+FROM golang:latest
+
+# Copy in code...
+RUN mkdir /app
+ADD main.go /app/
+
+# Build app
+WORKDIR /app
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o hello .
+
+# Could use something even smaller...
+FROM alpine:latest
+RUN apk --no-cache add ca-certificates
+
+RUN mkdir /app
+WORKDIR /app/
+COPY --from=0 /app/hello .
+
+# Expose ports for future REST Interface
+EXPOSE 8080
+
+CMD ["/app/hello"]