Added dockerfile

Dockerfile

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+FROM golang:1.16.0-alpine AS builder
+
+WORKDIR /opt/buid
+
+COPY ./*.go ./*.html ./go.mod ./go.sum ./
+COPY static ./static
+
+RUN apk add gcc musl-dev linux-headers
+RUN go get
+RUN go build
+
+FROM alpine:3.14
+
+ENV PORT=17422
+ENV DOMAIN=satdress.com
+ENV SECRET=askdbasjdhvakjvsdjasd
+ENV SITE_OWNER_URL=https://t.me/fiatjaf
+ENV SITE_OWNER_NAME=@fiatjaf
+ENV SITE_NAME=Satdress
+
+COPY --from=builder /opt/buid/satdress /usr/local/bin/
+
+EXPOSE 17422
+
+CMD ["satdress"]