Squashed commit of the following:

commit fa69f586b54d462b5effac77666678a39b39c261
Author: Viktor Roytman <vr2262@columbia.edu>
Date:   Tue Dec 6 14:59:12 2016 -0500

    Update version to 0.0.7

commit 1dbabdebcc3806e7dea58f288d23182e028ef10d
Author: Viktor Roytman <vr2262@columbia.edu>
Date:   Tue Dec 6 14:58:29 2016 -0500

    Update cron command

Author: vr2262

prod/docker-compose.yml

@@ -1,7 +1,7 @@
 version: '2'
 services:
   minigrid:
-    image: selcolumbia/minigrid-server:0.0.6
+    image: selcolumbia/minigrid-server:0.0.7
     command: ./prod/run.sh --db_host=db --redis_url=redis://redis:6379/0 --minigrid-website-url=https://www.example.com
     depends_on:
       - redis

prod/install.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env sh
-# Minigrid Server installer for version 0.0.6
+# Minigrid Server installer for version 0.0.7
 set -e
 
 # Do you have docker installed?
@@ -108,8 +108,8 @@ $SUDO openssl dhparam -out /etc/letsencrypt/live/$LETSENCRYPT_DIR/dhparam.pem 20
 printf "========================================\n"
 printf " Downloading configuration files        \n"
 printf "========================================\n"
-$CURL -L https://raw.githubusercontent.com/SEL-Columbia/minigrid-server/0.0.6/prod/docker-compose.yml > docker-compose.yml
-$CURL -L https://raw.githubusercontent.com/SEL-Columbia/minigrid-server/0.0.6/prod/nginx.conf > nginx.conf
+$CURL -L https://raw.githubusercontent.com/SEL-Columbia/minigrid-server/0.0.7/prod/docker-compose.yml > docker-compose.yml
+$CURL -L https://raw.githubusercontent.com/SEL-Columbia/minigrid-server/0.0.7/prod/nginx.conf > nginx.conf
 
 sed -i s/www.example.com/$LETSENCRYPT_DIR/g docker-compose.yml
 sed -i s/www.example.com/$LETSENCRYPT_DIR/g nginx.conf
@@ -142,7 +142,7 @@ CRON_CMD="mkdir -p /tmp/letsencrypt && "\
 " -v /var/lib/letsencrypt:/var/lib/letsencrypt:Z"\
 " -v /tmp:/tmp:Z"\
 " -v /var/log/letsencrypt:/var/log/letsencrypt:Z"\
-" quay.io/letsencrypt/letsencrypt renew --quiet --webroot-path /tmp/letsencrypt --post-hook 'touch /tmp/renewed' ; "\
+" quay.io/letsencrypt/letsencrypt renew --quiet --webroot --webroot-path /tmp/letsencrypt --post-hook 'touch /tmp/renewed' ; "\
 "if [ -f /tmp/renewed ] ; then docker restart $NGINX_CONTAINER_NAME ; fi ; "\
 "rm -f /tmp/renewed"
 # https://certbot.eff.org/#ubuntuxenial-nginx recommends running this twice a day on random minute within the hour