reorg dir structure, add docker image build

Dockerfile

@@ -0,0 +1,33 @@
+# syntax=docker/dockerfile:1 -*-python-*-
+FROM golang:1.20-alpine as builder
+
+RUN apk update
+RUN apk upgrade
+RUN apk add --no-cache git make bash binutils
+
+RUN git --version
+
+WORKDIR /work
+
+COPY go.mod .
+RUN go mod download
+COPY . .
+RUN make && strip upd
+
+FROM alpine:3.17
+LABEL maintainer="Uploads Author <info@daemon.de>"
+
+RUN install -o 1001 -g 1001 -d /data
+
+WORKDIR /app
+COPY --from=builder /work/upd /app/upd
+
+ENV UPD_LISTEN=:8080
+ENV UPD_STORAGEDIR=/data
+ENV UPD_DBFILE=/data/bbolt.db
+ENV UPD_DEBUG=1
+
+USER 1001:1001
+EXPOSE 8080
+VOLUME /data
+CMD ["/app/upd"]