add usage of environment variables

nginx/nginx.conf

@@ -6,11 +6,20 @@ http {
     server_tokens off;
     charset utf-8;
 
-	server {
-        listen 80 default_server;
-	    server_name _;
-	    return 301 https://$host$request_uri;
-	}
+    server {
+        listen 80;
+        server_name adam-french.co.uk www.adam-french.co.uk;
+
+        # Allow Certbot to access the ACME challenge
+        location /.well-known/acme-challenge/ {
+            root /var/www/certbot;
+        }
+
+        # Redirect everything else to HTTPS
+        location / {
+            return 301 https://$host$request_uri;
+        }
+    }
 
 
 	server {
@@ -29,7 +38,7 @@ http {
         }
 
         location /posts/ {
-            proxy_pass http://localhost:8080/posts;
+            proxy_pass http://backend:8080/posts;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;