Merge tag 'init-repo' into develop

.github/workflows/build.yml

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+name: build
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [8.x, 10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: npm install, build, and test
+      run: |
+        npm ci
+        npm run build --if-present
+        npm test
+      env:
+        CI: true
+    - name: Coveralls GitHub Action
+      uses: coverallsapp/github-action@v1.0.1 
+      with: 
+        token: ${{ secrets.CODECOV_TOKEN }}
+        github-token: ${{ secrets.github_token }}

.gitignore

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+node_modules
+coverage

README.md

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+# Jack VM · ![Build Status](https://github.com/mistlog/jack-vm/workflows/build/badge.svg) [![Coverage Status](https://coveralls.io/repos/github/mistlog/jack-vm/badge.svg)](https://coveralls.io/github/mistlog/jack-vm)
+
+Jack VM is implemented in [typedraft](https://github.com/mistlog/typedraft) to demonstrate literate programming. 
+
+The OS provided by [Nand to Tetris](https://www.nand2tetris.org/) course runs well and renders the following images:
+
+
+![](https://user-images.githubusercontent.com/54229343/71319830-569ecd00-249b-11ea-95db-a42a2450ab9f.png)
+
+![](https://user-images.githubusercontent.com/54229343/71319833-5999bd80-249b-11ea-8825-db188f2c797c.png)
+
+![](https://user-images.githubusercontent.com/54229343/71319828-543c7300-249b-11ea-850d-1040b09582dc.png)
+
+
+## Documentation
+
+See source-view folder.
+
+## License
+
+Jack VM is [MIT licensed](https://github.com/mistlog/jack-vm/blob/master/LICENSE).

jest.config.js

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+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  notify: true
+};