Update Dockerfile

Dockerfile

@@ -1,14 +1,23 @@
 FROM node:6.10
 
-COPY *.* /app/
-COPY views/ /app/
-COPY public /app/
+LABEL maintainer "dmitry@demenchuk.me"
+LABEL version="1.0"
+LABEL description="If you need to convert text from one markup format into another, pandoc is your swiss-army knife."
 
-WORKDIR /app/
+# Create app directory
+RUN mkdir -p /usr/src/pandoc-as-a-service
+COPY . /usr/src/pandoc-as-a-service
+WORKDIR /usr/src/pandoc-as-a-service
 
-RUN apt-get update \
-    && apt-get install -y pandoc \
-    && npm install
+# Install packages
+RUN apt-get update --fix-missing
+RUN apt-get install -y pandoc
+
+# Clean up
+RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Install service
+RUN npm install
 
 EXPOSE 8080