Fixes mm-1960 allows upload of files over 1MB to Elastic Beanstalk

docker/dev/Dockerrun.aws/.ebextensions/01_files.config

@@ -0,0 +1,14 @@
+files:
+    "/etc/nginx/conf.d/proxy.conf":
+      mode: "000755"
+      owner: root
+      group: root
+      content: |
+        client_max_body_size 50M;
+    "/opt/elasticbeanstalk/hooks/appdeploy/post/init.sh":
+      mode: "000755"
+      owner: root
+      group: root
+      content: |
+        #!/usr/bin/env bash
+        gpasswd -a ec2-user docker