File system permission hardening

[mcpattrsn]

All private key and certificate files (including custom certs and temp files) are now written with 0600 permissions. Directory creation for custom certs uses 0700 permissions.

Its redundant, but ensures it is consistent for all sensitive files.

The catch block is intentionally left empty.

[nginxproxymanagerci]

CI Error:

/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
certbot-node: Pulling from nginxproxymanager/nginx-full
Digest: sha256:3cdbaf1f3e0206689c91098a9147a4ccf2a1a563ab42dbf662a068b186e9832d
Status: Image is up to date for nginxproxymanager/nginx-full:certbot-node
docker.io/nginxproxymanager/nginx-full:certbot-node
�[1;34m❯ �[1;36mTesting backend ...�[0m
yarn install v1.22.22
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
warning " > @apidevtools/[email protected]" has unmet peer dependency "openapi-types@>=7".
[4/4] Building fresh packages...
Done in 17.64s.
yarn run v1.22.22
$ /app/node_modules/.bin/eslint .

/app/internal/certificate.js
  552:60  error  Empty block statement  no-empty
  565:60  error  Empty block statement  no-empty
  693:54  error  Empty block statement  no-empty
  728:54  error  Empty block statement  no-empty

✖ 4 problems (4 errors, 0 warnings)

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.