add docker config and CI config (#109)

.github/workflows/build-and-push.yml

@@ -0,0 +1,23 @@
+name: Build and deploy
+
+on: [push]
+
+env:
+  DOCKER_REPO: ${{ secrets.DOCKER_USERNAME }}/codex-docs
+
+jobs:
+  build_and_deploy:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Build and push docker image
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          repository: ${{ env.DOCKER_REPO }}
+          tag_with_ref: true
+          dockerfile: docker/Dockerfile.prod
+          push: ${{ endsWith(github.ref, '/stage') || endsWith(github.ref, '/prod') }}

docker-compose.yml

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+version: "3.2"
+services:
+  docs:
+    build:
+      dockerfile: docker/Dockerfile.prod
+      context: .
+    ports:
+      - 5000:3000
+    volumes:
+      - ./.codexdocsrc:/usr/src/app/.codexdocsrc:ro
+      - ./config/production.json:/usr/src/app/config/production.json:ro
+      - ./public/uploads:/usr/src/app/public/uploads
+      - ./.db:/usr/src/app/.db

docker/Dockerfile.prod

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+FROM node:12.14.1-alpine3.11
+
+WORKDIR /usr/src/app
+RUN apk add --no-cache git gcc g++ python make musl-dev
+
+COPY package.json yarn.lock ./
+
+RUN yarn install --prod
+
+COPY . .
+
+CMD ["yarn", "start"]