Fixes laradock/laradock#/1245 by adding python to the image

laravel-echo-server/Dockerfile

@@ -1,15 +1,22 @@
 FROM node:alpine
- 
+
 # Create app directory
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
- 
+
 # Install app dependencies
 COPY package.json /usr/src/app/
+
+RUN apk add --update \
+    python \
+    python-dev \
+    py-pip \
+    build-base
+
 RUN npm install
- 
+
 # Bundle app source
 COPY laravel-echo-server.json /usr/src/app/laravel-echo-server.json
- 
+
 EXPOSE 3000
-CMD [ "npm", "start" ]
+CMD [ "npm", "start" ]