ci: add Dockerfile && .dockerignore

Ref:
  - eggjs/egg#1431
  - https://eggjs.org/zh-cn/core/deployment.html

Author: KJlmfe

Diff for: .dockerignore

@@ -0,0 +1,2 @@
+node_modules
+npm-debug.log

Diff for: Dockerfile

@@ -0,0 +1,19 @@
+FROM node:carbon
+
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY package*.json ./
+
+# RUN npm install
+# If you are building your code for production
+RUN npm install --only=production
+
+# Bundle app source
+COPY . .
+
+EXPOSE 7001
+
+CMD [ "npm", "run", "start:docker"]

Diff for: package.json

@@ -22,6 +22,7 @@
   },
   "scripts": {
     "start": "egg-scripts start --daemon --title=egg-server-smart-signature-server",
+    "start:docker": "egg-scripts start",
     "stop": "egg-scripts stop --title=egg-server-smart-signature-server",
     "dev": "egg-bin dev",
     "debug": "egg-bin debug",