Added Google Login.

[opsnin]

• Added Login with google in UI.
• Added a DB field to check whether user is allowed or not. IF it is authencated with google allowed is set to true.
• Modified build.sh the sed command had some issues so it wasnot able to update the Dockerfile. Also the arm64 architecutre was missing added it too.
• Gogle configurations can be passed as Environment Variables. Here we can update secrets , cliendID from google developer console and allowed domains checked which email domains are allowed. Required ENV variables for google login to work.

     GOOGLE_CLIENT_ID
     GOOGLE_CLIENT_SECRET
     GOOGLE_REDIRECT_URL
     ALLOWED_DOMAINS

• Two new modules were added,
  1. golang.org/x/oauth2 v0.21.0
  2 . google.golang.org/api v0.185.0
• Updated login.html to show button for login with google. By default the google logged in Users don't have Admin access.

[d3vilh]

Thank you! Let me test it with different archs and we good to go with merging to main.

[droid-sheep]

@janamkhatiwada Is it possible to enhance this feature for a general implementation of OAuth? Described in #75 this feature is requested by some people (and myself). This would establish openvpn-ui to a mentionable competitor against enterprise vpn solutions with a user portal and would be interesting for companies.

I would support this but i can't write GO code.

[d3vilh]

I merge it, but updated build process, so it will support arm64 in addition to aarm64.

I think, we need option to enable Google login in OpenVPN-UI settings and few more options on the same page to set GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, GOOGLE_REDIRECT_URL, ALLOWED_DOMAINS, not just env but manually.

All these would be nice to have to make login page a bit more user-friendly if someday in the future we wild add new auth method (Oauth?).

Planning to do it next couple of weeks and then we could have new major release with all the containers rebuild.

@janamkhatiwada thanks a lot for great idea and nice implementation.

[d3vilh]

@janamkhatiwada Is it possible to enhance this feature for a general implementation of OAuth? Described in #75 this feature is requested by some people (and myself). This would establish openvpn-ui to a mentionable competitor against enterprise vpn solutions with a user portal and would be interesting for companies.

I would support this but i can't write GO code.

I would be glad to add it. but have new interesting project on my main job, which soaks all my time.