cd ~
wget https://github.com/bpatrik/pigallery2/releases/download/1.7.0/pigallery2.zip
unzip pigallery2.zip -d pigallery2
cd pigallery2

$ ls -l
total 224
drw-rw-rw-   5 pweaver pweaver   4096 Jan 27  2019 backend
drwxrwxrwx   5 pweaver pweaver   4096 Feb 15  2019 common
drwxrwxrwx   6 pweaver pweaver   4096 Jul 21 17:31 dist
-rw-rw-rw-   1 pweaver pweaver   1095 Jul 21 17:32 LICENSE
drwxrwxr-x 460 pweaver pweaver  20480 Sep  1 23:03 node_modules
-rw-rw-rw-   1 pweaver pweaver   1625 Jul 21 17:32 package.json
-rw-rw-r--   1 pweaver pweaver 174452 Sep  1 23:03 package-lock.json
-rw-rw-rw-   1 pweaver pweaver   9509 Jul 21 17:32 README.md

$ ls backend
ls: cannot access 'backend/Logger.js': Permission denied
ls: cannot access 'backend/server.js': Permission denied
ls: cannot access 'backend/model': Permission denied
ls: cannot access 'backend/routes': Permission denied
ls: cannot access 'backend/middlewares': Permission denied
ls: cannot access 'backend/index.js': Permission denied
ls: cannot access 'backend/ProjectPath.js': Permission denied
index.js  Logger.js  middlewares  model  ProjectPath.js  routes  server.js

$ cat backend/Logger.js
cat: backend/Logger.js: Permission denied

for i in 1 2 3 4; do
  find -maxdepth $i -type d | xargs chmod u x,g x # find cannot read at depth N 1 until depth N has correct permissions
done

chmod -R o-w .