dockerfile: optimize Dockerfile

[No0key]

Hello!

This PR optimizes the Dockerfile.

Changes include:

• Combined RUN commands to reduce the number of layers
• Cached Go dependencies to speed up build times
• Cleaned up unnecessary apt files to reduce image size
• Consolidated user creation and permission setting commands

Category: refactor

Reduced image size from 370MB to 302MB

[No0key]

@KaloyanTanev can you rerun tests? title name was fixed

[pinebit]

I am good with this PR, will delegate final approval and merge to @KaloyanTanev

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud