Add initial MQTT scrubber service scaffold

Dockerfile

@@ -0,0 +1,28 @@
+FROM golang:1.24-alpine AS build
+
+WORKDIR /src
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/mqqt-scrubber ./cmd/mqqt-scrubber
+
+FROM alpine:3.20
+
+RUN addgroup -S app && adduser -S -G app app \
+	&& apk add --no-cache ca-certificates wget
+
+WORKDIR /app
+
+COPY --from=build /out/mqqt-scrubber /usr/local/bin/mqqt-scrubber
+COPY config.example.json /app/config.json
+
+USER app
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 CMD wget -q -O- http://127.0.0.1:8080/healthz >/dev/null || exit 1
+
+ENTRYPOINT ["/usr/local/bin/mqqt-scrubber"]
+CMD ["-config", "/app/config.json"]