Update permissions from 777 to 1777

This still supports the "arbitrary user" use case but with slightly tighter permissions on the end result.

Author: tianon

3.10/alpine/Dockerfile

@@ -227,7 +227,7 @@ RUN set -eux; \
 	adduser -u 100 -S -h "$RABBITMQ_DATA_DIR" -G rabbitmq rabbitmq; \
 	mkdir -p "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
 	chown -fR rabbitmq:rabbitmq "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
-	chmod 777 "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
+	chmod 1777 "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
 	ln -sf "$RABBITMQ_DATA_DIR/.erlang.cookie" /root/.erlang.cookie; \
 	\
 	apk add --no-cache \

3.10/ubuntu/Dockerfile

@@ -219,7 +219,7 @@ RUN set -eux; \
 	useradd --uid 999 --system --home-dir "$RABBITMQ_DATA_DIR" --gid rabbitmq rabbitmq; \
 	mkdir -p "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
 	chown -fR rabbitmq:rabbitmq "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
-	chmod 777 "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
+	chmod 1777 "$RABBITMQ_DATA_DIR" /etc/rabbitmq /etc/rabbitmq/conf.d /tmp/rabbitmq-ssl /var/log/rabbitmq; \
 	ln -sf "$RABBITMQ_DATA_DIR/.erlang.cookie" /root/.erlang.cookie
 
 # Use the latest stable RabbitMQ release (https://www.rabbitmq.com/download.html)