Phase 1 MVP — echo bot factory

Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.23-alpine AS builder
+
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o gateway .
+
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates && \
+    addgroup -g 65532 -S app && \
+    adduser  -u 65532 -S app -G app
+
+WORKDIR /home/app
+COPY --from=builder /app/gateway /usr/local/bin/gateway
+
+USER 65532:65532
+EXPOSE 8080
+ENTRYPOINT ["/usr/local/bin/gateway"]
+CMD ["serve"]