Added LOG_LEVEL environment variable to set logging severity level.

Dockerfile

@@ -25,7 +25,8 @@ ENV ALLOW_RESTARTS=0 \
     SYSTEM=0 \
     TASKS=0 \
     VERSION=1 \
-    VOLUMES=0
+    VOLUMES=0 \
+    LOG_LEVEL=info
 COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg
 
 # Metadata

README.md

@@ -141,6 +141,12 @@ does not need.
 - `TASKS`
 - `VOLUMES`
 
+## Logging
+
+You can set the logging level or severity level of the messages to be logged with the
+ environment variable `LOG_LEVEL`. Defaul value is info. Possible values are: debug, 
+ info, notice, warning, err, crit, alert and emerg.
+
 ## Supported API versions
 
 - [1.27](https://docs.docker.com/engine/api/v1.27/)

haproxy.cfg

@@ -1,5 +1,5 @@
 global
-    log stdout format raw daemon
+    log stdout format raw daemon "${LOG_LEVEL}"
 
     pidfile /run/haproxy.pid
     maxconn 4000