CI/CD

feat: Export proposals attachments url (#126) #275

Job	Run time
Test build docker image	3m 11s
System tests (0-4)	3m 14s
Tests (0-2)	3m 48s
Lint code	2m 43s
System tests (1-4)	3m 18s
Tests (1-2)	3m 19s
TODO	7s
System tests (2-4)	3m 4s
System tests (3-4)	3m 15s
Check for Zeitwerk errors	2m 11s
Build and push image to Registry	1s
Generate release	1s
	28m 12s

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