🐳 Add Dockerfile

Dockerfile

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+FROM golang:1.15 AS builder
+
+RUN mkdir /data && mkdir /data/shares
+
+ADD . /src
+WORKDIR /src
+
+ENV CGO_ENABLED=0
+
+RUN go build .
+
+# Actual image
+FROM scratch
+
+ENV DATA_DIR=/data/shares
+ENV DATABASE=/data/ShareDAV.db
+
+COPY --from=builder /src/ShareDAV /app/ShareDAV
+COPY --from=builder /data /data
+
+ENTRYPOINT ["/app/ShareDAV"]
+CMD ["serve"]