add option to turn on access log

build/Dockerfile

@@ -35,6 +35,7 @@ ENV TZ=Etc/UTC
 ENV SERVER_NAMES="_"
 ENV HTTP_PORT=80
 ENV HTTPS_PORT=443
+ENV ACCESS_LOG=OFF
 ENV HSTS=FALSE
 ENV TLS13_ONLY=FALSE
 

build/config/nginx.conf

@@ -35,8 +35,7 @@ http {
         'uaddr="$upstream_addr" ustat="$upstream_status" '
         'utime="$upstream_response_time" ulen="$upstream_response_length" '
         'cache="$upstream_cache_status"';
-    #access_log /var/log/nginx/access.log main;
-    access_log off;
+    access_log <ACCESS_LOG_SETTING>;
 
     # server configuration options
     server_tokens off;

build/entrypoint.sh

@@ -10,6 +10,17 @@ printf "\nUpdating server name list... "
 sed -i -e "s%<SERVER_NAMES>%${SERVER_NAMES}%" /etc/nginx/server_names.conf
 printf "done\n"
 
+# update access log global preference
+if [ "$ACCESS_LOG" = "OFF" ]; then
+    printf "Turning access log OFF..."
+    sed -i -e "s%<ACCESS_LOG_SETTING>%OFF%" /etc/nginx/nginx.conf
+    printf "done\n"
+elif [ "$ACCESS_LOG" = "ON" ]; then
+    printf "Turning access log ON..."
+    sed -i -e "s%<ACCESS_LOG_SETTING>%/var/log/nginx/access.log combined%" /etc/nginx/nginx.conf
+    printf "done\n"
+fi
+
 # update HTTPS redirect port if SSL server test block exists
 if [ -f "/etc/nginx/sites/note" ]; then
     printf "\nUpdating port redirects...\n"