Create dockerfiles for the rustpython binary and wasm demo

.dockerignore

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+target
+**/node_modules

Dockerfile.bin

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+FROM rust:1.31-slim
+
+WORKDIR /rustpython
+
+COPY . .
+
+RUN cargo build --release
+
+CMD [ "/rustpython/target/release/rustpython" ]

Dockerfile.wasm

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+FROM rust:1.31-slim
+
+RUN apt-get update && apt-get install curl gnupg -y && \
+    curl -o- https://deb.nodesource.com/setup_10.x | bash && \
+    apt-get install nodejs -y && \
+    curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh && \
+    npm i -g serve
+
+WORKDIR /rustpython
+
+COPY . .
+
+RUN cd ./wasm/lib/ && \
+    cargo build --release && \
+    cd ../demo && \
+    npm install && \
+    npm run dist
+
+CMD [ "serve", "/rustpython/wasm/demo/dist" ]