chore: add docker file

.dockerignore

@@ -0,0 +1,12 @@
+.git
+.gitattributes
+.github
+README.md
+assets
+.task
+dist
+out
+*.png
+*.txt
+LICENSE
+*.yml

Dockerfile

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+ARG GO_VERSION=1.17
+
+## Build container
+FROM golang:${GO_VERSION}-alpine AS builder
+
+RUN mkdir /user && \
+    echo 'nobody:x:65534:65534:nobody:/:' > /user/passwd && \
+    echo 'nobody:x:65534:' > /user/group
+
+WORKDIR /src
+
+COPY ./go.mod ./go.sum ./
+RUN go mod download
+
+COPY ./ ./
+RUN CGO_ENABLED=0 go build -installsuffix 'static' -o /zmk-viewer /src/cmd/zmk-viewer
+
+## Final container
+FROM scratch AS final
+
+COPY --from=builder /user/group /user/passwd /etc/
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /zmk-viewer /zmk-viewer
+
+USER 65534:65534
+
+ENTRYPOINT ["/zmk-viewer"]