Avoid error if cont-env not defined

guacamole/Dockerfile

@@ -95,6 +95,7 @@ RUN \
     if [ -d /etc/cont-init.d ]; then chmod -R 755 /etc/cont-init.d; fi && \
     if [ -d /etc/services.d ]; then chmod -R 755 /etc/services.d; fi && \
     #Correct shebang in entrypoint
+    mkdir -p /run/s6/container_environment && \
     for shebang in "/command/with-contenv bashio" "/usr/bin/env bashio" "/usr/bin/bashio" "/bin/bash" "/bin/sh"; do if [ -f "${shebang%% *}" ]; then break; fi; done; sed -i "s|/command/with-contenv bashio|$shebang|g" /ha_entrypoint.sh
 
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