add drone config

Dockerfile

@@ -1,13 +1,12 @@
-FROM node:8
+FROM node:8-alpine
 LABEL maintainer="Jay <admin@trj.tw>"
 ENV NODE_PORT 5111
 RUN mkdir -p /data
 WORKDIR /data
 COPY . .
 RUN rm -f .env
-RUN apt-get update -qqy \
-  && apt-get install -qqy imagemagick graphicsmagick \
-  && apt-get clean
+RUN apk update && \
+    apk add imagemagick graphicsmagick git curl wget bash mc build-base python
 RUN npm install
 EXPOSE ${NODE_PORT}
 CMD ["npm", "run", "dbrun"]