🔧 Add Dockerfile to Deploy

Dockerfile

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+FROM golang:alpine
+
+ENV GO111MODULE=on \
+    CGO_ENABLED=0 \
+    GOOS=linux \
+    GOARCH=amd64
+
+WORKDIR /build
+
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
+COPY . .
+
+RUN go build -o main .
+
+WORKDIR /dist
+
+RUN cp /build/main .
+
+EXPOSE 3000
+
+CMD ["/dist/main"]