Lets Start :
There are 2 steps:
- Access your Ghost instance
- Enable Firewalls
Access your Ghost instance:

- Open Your Google Console Dashboard.

- Open Your Google Console Dashboard Then Click Top Left Conner humbar Icon.Click Compute Engine, Select VM Instance Then Your VM Instance Page Open.

- After Open Instance page.Click SSH Button.

- After Open Your Instance Page. Then Click SSH Button. Some You See Open New Window In button Side you See Your SSH terminal Successfully Open.

- Open Your Currently Install Ghost Instances.
Enable Firewalls:

When Your Instance Webpage, Open In Your Web browser. Then Go To Scroll Down Find Firewalls Section And Enable Both Firewalls.
- Allow HTTP traffic (Enable)
- Allow HTTPS traffic (Enable)
After You Allow Https Or Http Request On Your Domain and After install SSL. if You Do Not Enable Firewalls. You show error InSide GCP Make Sure You Enable Firewalls Then Install SSL.
Note:
- Same Case You all ready Install SSL Your Doamin. You Website Image Not Show.In that Case Firstly Enable Your Firewalls In Your Ghost Instance.
- And Config Your Domain In side Your Configure config.production.json and Add Https In Side Url.
- Make Sure Restart Your Ghost CMS.This Most Important Step For You.
Exmple :
url:"http://officialrajdeepsingh.dev"
Change Https In Side Your config.production.json File
url:"https://officialrajdeepsingh.dev"
After You Change url In Your Website. You See Image Success Render on Your, With Absolute Path with SSL.
