add docker recipe

.dockerignore

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+target
+Dockerfile
+.dockerignore
+.git
+.gitignore

Dockerfile

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+# Compile
+FROM    alpine:3.10 AS compiler
+
+RUN     apk update --quiet
+RUN     apk add curl
+RUN     apk add build-base
+
+RUN     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+WORKDIR /meilisearch
+
+COPY    . .
+
+ENV     RUSTFLAGS="-C target-feature=-crt-static"
+
+RUN     $HOME/.cargo/bin/cargo build --release
+
+# Run
+FROM    alpine:3.10
+
+RUN     apk add -q --no-cache libgcc tini
+
+COPY    --from=compiler /meilisearch/target/release/meilisearch .
+
+ENV     MEILI_HTTP_ADDR 0.0.0.0:7700
+EXPOSE  7700/tcp
+
+ENTRYPOINT ["tini", "--"]
+CMD     ./meilisearch