Merge pull request #1 from 3YOURMIND/add-editorconfig

fix: use spaces instead of tabs and include editorconfig

.editorconfig

@@ -0,0 +1,10 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

Dockerfile

@@ -3,12 +3,12 @@ FROM node:8.11.3-slim
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-	    git \
-	    python \
-	    make \
-	    gcc \ 
-	    g++ \
-	    libc6-dev
+        git \
+        python \
+        make \
+        gcc \
+        g++ \
+        libc6-dev
 
 RUN git clone https://github.com/Financial-Times/polyfill-service.git /polyfill