First, get a working CentOS 7 server with your preferred stack. Next, install requirements:
yum groupinstall -y development
yum install -y git glibc-static epel-release nodejs npm
Now clone the git repo and Install the Cloud9 SDK:
git clone https://github.com/c9/core.git c9sdk
cd c9sdk/
scripts/install-sdk.sh
Get DNS set up to point to the box, then use Certbot to get a Let's Encrypt cert:
sudo yum install certbot
certbot certonly --webroot -w /var/www/html/ -d $hostname
The output from this command shows you where the cert is saved.
Combine the cert and private key, and put the result somewhere c9 can see it.
cd /etc/letsencrypt/live/$hostname/
openssl rsa -in privkey.pem -out privkey_rsa.pem
touch combined_key.pem | cat privkey_rsa.pem fullchain.pem >> combined_key.pem
mv combined_key.pem /home/$user/c9sdk
chown $user:$user /home/$user/c9sdk/combined_key.pem
To keep it running, use Forever:
sudo npm install forever -g
cd c9sdk
forever start server.js -p 8080 -w ~/workspace/ -l 0.0.0.0 --auth developer:cleverpassword --secure combined_key.pem
Looks like you have a problem with folders permissions.
Avoid to install the C9 ide in the root directory of your server.
And don't install it with root, Use another user and start the server with that user.