updated server configuration

document root is at /usr/share/nginx/html
map app is located in /usr/share/nginx/html
server responds to /, /map, /map/, /karte, /karte/
server uses DE or EN page depending on $http_accept_language as set by client

Dockerfile

@@ -10,4 +10,4 @@ COPY nginx/mime.types /etc/nginx/mime.types
 COPY nginx/default.conf /etc/nginx/conf.d/default.conf
 
 # copy webpage content
-COPY www /usr/share/nginx/html
+COPY www /usr/share/nginx/html/map