Add Docker configuration

.dockerignore

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+node_modules
+vendor

Dockerfile

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+FROM node:14-alpine
+WORKDIR /app
+COPY . .
+RUN npm ci
+ENTRYPOINT [ "node", "index.js" ]

docker-compose.yml

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+services:
+  node:
+    build:
+      context: .
+    restart: always
+    ports:
+      - 8081:8081
+    networks:
+      - palmiers