silence mitmweb, nginx logs are hard enough to read

Dockerfile

@@ -25,7 +25,7 @@ RUN [[ "a$DO_DEBUG_BUILD" == "a1" ]] && { echo "Debug build ENABLED." \
 ENV LANG=en_US.UTF-8
 
 # Check the installed mitmproxy version, if built.
-RUN [[ "a$DO_DEBUG_BUILD" == "a1" ]] && { mitmproxy --version ; } || { echo "Debug build disabled."; }
+RUN [[ "a$DO_DEBUG_BUILD" == "a1" ]] && { mitmproxy --version && mitmweb --version ; } || { echo "Debug build disabled."; }
 
 # Create the cache directory and CA directory
 RUN mkdir -p /docker_mirror_cache /ca

entrypoint.sh

@@ -104,8 +104,7 @@ if [[ "a${DEBUG}" == "atrue" ]]; then
   mitmweb --no-web-open-browser --web-iface 0.0.0.0 --web-port 8081 \
           --set keep_host_header=true --set ssl_insecure=true \
           --mode reverse:https://127.0.0.1:444 --listen-host 0.0.0.0 \
-          --listen-port 443 --certs /certs/fullchain_with_key.pem \
-          -w /ca/outfile &
+          --listen-port 443 --certs /certs/fullchain_with_key.pem &> /dev/null &
   echo "Access mitmweb via http://127.0.0.1:8081/ "
 fi