Add proxy build argument to dockerfiles #214

Job	Run time
AAS Registry Kafka Mem - Build and Start Docker Image	2m 29s
AAS Registry Kafka MongoDB - Build and Start Docker Image	2m 42s
AAS Environment - Build and Start Docker Image	2m 22s
AAS Discovery - Build and Start Docker Image	2m 19s
AAS Registry Log Mem - Build and Start Docker Image	2m 21s
AAS Registry Log MongoDB - Build and Start Docker Image	2m 19s
AAS Repository - Build and Start Docker Image	2m 6s
AASX File Server - Build and Start Docker Image	2m 11s
Concept Description Repository - Build and Start Docker Image	2m 25s
Submodel Registry Kafka Mem - Build and Start Docker Image	2m 28s
Submodel Registry Kafka MongoDB - Build and Start Docker Image	2m 35s
Submodel Registry Log Mem - Build and Start Docker Image	2m 24s
Submodel Registry Log MongoDB - Build and Start Docker Image	2m 35s
Submodel Repository - Build and Start Docker Image	2m 8s
Submodel Service - Build and Start Docker Image	2m 8s
	35m 32s

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