Add cache service definition

Adds Cache service definition in the docker-compose environment

FYI: @tziai

env/cache.env

+HTTP_HOST=""
+HTTP_PORT="8083"
+HTTP_IDLE_TIMEOUT="120s"
+HTTP_READ_TIMEOUT="10s"
+HTTP_WRITE_TIMEOUT="10s"
+REDIS_ADDR="redis:6379"
+REDIS_USER=""
+REDIS_PASS=""
+REDIS_DB=0
+REDIS_EXPIRATION="1h"
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