add docker file

.dockerignore

@@ -0,0 +1,6 @@
+node_modules
+.git/
+.gitignore
+tests/
+npm-debug.log
+.DS_Store

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:latest
+
+WORKDIR /usr/src/app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+EXPOSE 3000
+
+CMD ["node", "src/index.js"]