Add separate docker file for linux 16.04

Enable dynamic path with environment variable which triggers node js build at container runtime

image/etc/RenameURL.py

@@ -1,7 +1,11 @@
 import os, fnmatch
 
 toFind = "/app"
-toReplace = os.getenv("PREFIX_PATH", "/app")
+toReplace = os.getenv("PREFIX_PATH")
+
+if (toReplace is None):
+    print("No path given by environment variable.")
+    exit()
 
 print("using path {0} ...".format(toReplace))
 

image/etc/install.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+echo 'Building Node.js project...'
+cd /src/web \
+    && yarn \
+    && npm run build
+
+cp -R /src/web/dist/. /usr/local/lib/web/frontend/
+echo 'Build finished.'