chore: add dockerfile

Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.25-alpine AS builder
+
+WORKDIR /app
+
+# Add go.sum if have deps
+COPY go.mod ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/web/main.go
+
+FROM alpine:latest
+
+WORKDIR /root/
+
+COPY --from=builder /app/server .
+
+EXPOSE 7777
+
+CMD ["./server"]