Add Docker Hub image builds

Dockerfile

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+FROM golang:alpine AS build
+
+RUN apk add --update git make build-base npm && \
+    rm -rf /var/cache/apk/*
+
+WORKDIR /src/AdGuardHome
+COPY . /src/AdGuardHome
+RUN make
+
+FROM alpine:latest
+LABEL maintainer="AdGuard Team <devteam@adguard.com>"
+
+# Update CA certs
+RUN apk --no-cache --update add ca-certificates && \
+    rm -rf /var/cache/apk/*
+
+COPY --from=build /src/AdGuardHome/AdGuardHome /AdGuardHome
+
+EXPOSE 53 3000
+
+VOLUME /data
+
+ENTRYPOINT ["/AdGuardHome"]
+CMD ["-h", "0.0.0.0"]