Add files necessary for production deployment

* Dockerfile, docker-compose template
* nginx config
* uwsgi config
* wait-for-postgres script
* requirements.txt
* Some other stuff

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

nginx.conf

@@ -0,0 +1,17 @@
+server {
+    listen 80;
+    server_name _;
+
+    location /static {
+        root /usr/share/nginx/html;
+    }
+
+    location /media {
+        root /usr/share/nginx/html;
+    }
+
+    location / {
+        include uwsgi_params;
+        uwsgi_pass app:3031;
+    }
+}