add docker files & nginx config

Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:1.25-alpine
+RUN apk add --no-cache gcc musl-dev
+
+WORKDIR /app
+
+COPY go.work go.work.sum ./
+COPY api ./api
+RUN go work vendor
+
+RUN CGO_ENABLED=1 go build -o /usr/local/bin/api ./api
+
+EXPOSE 5000
+
+CMD ["api"]