Want odoo deployment solution for multiple services(per client) in a single cloud server with automation, subdomain setup & ssl security for each subdomain (each client having unique urp/ip mask with unique subdomain)

basically, I Want to set up a SAAS for odoo 13 community edition. (need to understand the saas functionality from you to find whether this is the same which I want or not.) My current practice: * I have around 40 clients currently and they are increasing every month. * I have deployed them on digital ocean cloud * I create separate odoo user and Postgres user for each of my clients with the same name * I switch the user to the newly created user and run the odoo service on the new port by --xmlrpc-port=8256 My current problem: * The IP which I give to the client is not secured by SSL, so the image sent in the mail sent from email marketing is not opened in the received mail * Many time the service of the client is closed automatically with following error, but when i see the server utilization, only 20% CPU is being utilized - Runtime error: can't start a new thread - The connection pool is full - sorry - too many clients already * every time I need to create the client database manually with all the steps mentioned above, and install all the modules, so if by doing SAAS Setup, we can automate this and it will also resolve my above problem then it will be great. So ultimately I want to resolve my above issues, so if you have expertise in this, please add your solution without fail in your offer.