feat: Possibility to set up logging

Dockerfile

@@ -23,7 +23,9 @@ ENV AUTO_UPDATE_CRON="0 5 * * TUE" \
     WP_SITE_URL=example.org \
     WP_SITE_ADMIN_LOGIN=admin \
     WP_SITE_ADMIN_PASSWORD=riotkit \
-    [email protected]
+    [email protected] \
+    ACCESS_LOG=/dev/stdout \
+    ERROR_LOG=/dev/stderr
 
 # p2 (jinja2)
 RUN wget https://github.com/wrouesnel/p2cli/releases/download/r13/p2-linux-x86_64 -O /usr/bin/p2 && chmod +x /usr/bin/p2

README.md

@@ -232,6 +232,25 @@ waf:
         #DEBUG: true
 ```
 
+Access log and error log
+------------------------
+
+Point access and error logs to files, to stdout/stderr or disable logging by using environment variables.
+
+```bash
+ACCESS_LOG: /dev/stdout
+ERROR_LOG: /dev/stderr
+```
+
+```bash
+ACCESS_LOG: /mnt/logs/access.log
+ERROR_LOG: /mnt/logs/error.log
+```
+
+```bash
+ACCESS_LOG: off
+ERROR_LOG: off
+```
 
 From authors
 ------------

container-files/etc/nginx/nginx.conf

@@ -29,8 +29,8 @@ http {
     fastcgi_buffer_size 512k;
     fastcgi_buffers 16 512k;
 
-    access_log /dev/stdout;
-    error_log /dev/stderr info;
+    access_log {{ ACCESS_LOG }};
+    error_log {{ ERROR_LOG }} info;
 
     # should be enabled on gateway
     gzip off;