optimize docker (#300)

amundsen_application/wsgi.py

 import os
 from amundsen_application import create_app
 
-app = create_app(
+application = create_app(
     config_module_class=os.getenv('FRONTEND_SVC_CONFIG_MODULE_CLASS') or
     'amundsen_application.config.LocalConfig')
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0')
+    application.run(host='0.0.0.0')

local.Dockerfile

 ARG METADATASERVICE_BASE
 ARG SEARCHSERVICE_BASE
 
-FROM node:8 as node-stage
-
-COPY . /app
-
+FROM node:8-slim as node-stage
 WORKDIR /app/amundsen_application/static
 
+COPY amundsen_application/static/package.json /app/amundsen_application/static/package.json
+COPY amundsen_application/static/package-lock.json /app/amundsen_application/static/package-lock.json
 RUN npm install
+
+COPY amundsen_application/static/ /app/amundsen_application/static/
 RUN npm rebuild node-sass
 RUN npm run dev-build
 
-FROM python:3
-
-COPY --from=node-stage /app /app
+COPY . /app
 
+FROM python:3-slim
 WORKDIR /app
 
+COPY requirements3.txt /app/requirements3.txt
 RUN pip3 install -r requirements3.txt
+
+COPY --from=node-stage /app /app
+
 RUN python3 setup.py install
 
 ENTRYPOINT [ "python3" ]

public.Dockerfile

-FROM node:8 as node-stage
-
-COPY . /app
-
+FROM node:8-slim as node-stage
 WORKDIR /app/amundsen_application/static
 
+COPY amundsen_application/static/package.json /app/amundsen_application/static/package.json
+COPY amundsen_application/static/package-lock.json /app/amundsen_application/static/package-lock.json
 RUN npm install
-RUN npm run build
-
-FROM python:3
 
-COPY --from=node-stage /app /app
+COPY amundsen_application/static /app/amundsen_application/static
+RUN npm run build
 
+FROM python:3-slim
 WORKDIR /app
+RUN pip3 install gunicorn
 
+COPY requirements3.txt /app/requirements3.txt
 RUN pip3 install -r requirements3.txt
+
+COPY --from=node-stage /app /app
+COPY . /app
 RUN python3 setup.py install
 
-ENTRYPOINT [ "python3" ]
-CMD [ "amundsen_application/wsgi.py" ]
+CMD [ "python3",  "amundsen_application/wsgi.py" ]