diff --git a/docker/Dockerfile b/docker/Dockerfile
index d9de044..78a8069 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,5 +1,5 @@
-# sha256 as of 2020-09-25 for mainline-alpine
-FROM nginx@sha256:4635b632d2aaf8c37c8a1cf76a1f96d11b899f74caa2c6946ea56d0a5af02c0c
+# sha256 as of 2021-08-18 for nginx:mainline-alpine
+FROM nginx:mainline-alpine@sha256:bead42240255ae1485653a956ef41c9e458eb077fcb6dc664cbc3aa9701a05ce
 
 COPY docker/nginx.conf /etc/nginx
 RUN mkdir -p /opt/nginx && chown nginx:nginx /opt/nginx
diff --git a/docker/nginx.conf b/docker/nginx.conf
index c5ca389..6213e6a 100644
--- a/docker/nginx.conf
+++ b/docker/nginx.conf
@@ -22,8 +22,7 @@ http {
         location / {
             root /opt/nginx/root;
             index index.html;
-            # This line has been adjusted for the temporary different external URL.
-            # Don't include this change in the main branch.
+            # Catch all relevant URLs and redirect to most recent, i.e. "2021" route
             rewrite ^/https-everywhere($|//+)(.*) /https-everywhere-2021/$2 permanent;
         }
     }