Add Dockerfile and fix compose

Dockerfile

@@ -0,0 +1,2 @@
+FROM nginx:alpine
+COPY html/ /usr/share/nginx/html/

docker-compose.yml

@@ -2,8 +2,11 @@ services:
   web:
     image: nginx:alpine
     labels:
-      fibe.gg/exposure.enabled: "true"
-      fibe.gg/exposure.port: "80"
+      fibe.gg/repo_url: "https://git-next.fibe.live/viktorvsk/tower-defense"
+      fibe.gg/expose: "external:80"
+      fibe.gg/subdomain: "tower-defense"
       fibe.gg/production: "false"
-    volumes:
-      - ./html:/usr/share/nginx/html:ro
+      fibe.gg/start_command: "nginx -g 'daemon off;'"
+    environment:
+      - NGINX_HOST=localhost
+      - NGINX_PORT=80