ADD: added dockerfiles and a logger for the backend

Dockerfile.backend

@@ -0,0 +1,29 @@
+# =========================
+# Build stage
+# =========================
+FROM golang:1.25.5-alpine AS builder
+
+WORKDIR /app
+
+COPY backend/go.mod backend/go.sum ./
+RUN go mod download
+
+COPY backend/ ./
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -o server ./cmd/server
+
+
+# =========================
+# Runtime stage
+# =========================
+FROM gcr.io/distroless/base-debian12
+
+WORKDIR /app
+
+COPY --from=builder /app/server ./server
+
+EXPOSE 8081
+
+USER nonroot:nonroot
+ENTRYPOINT ["./server"]