feat(docker): making the UE_MTU value flexible, required for OAI-RAN CI usage with smartphones

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

etc/smf.conf

@@ -65,7 +65,7 @@ SMF =
     DEFAULT_DNS_SEC_IPV6_ADDRESS = "2001:4860:4860::8844";            # YOUR DNS CONFIG HERE
 
     #Default UE MTU
-    UE_MTU = 1358;
+    UE_MTU = @UE_MTU@;
 
     # SUPPORT FEATURES
     SUPPORT_FEATURES:

scripts/entrypoint.sh

@@ -10,6 +10,7 @@ USE_NETWORK_INSTANCE=${USE_NETWORK_INSTANCE:-no}
 USE_LOCAL_SUBSCRIPTION_INFO=${USE_LOCAL_SUBSCRIPTION_INFO:-yes}
 DOMAIN_ACCESS=${DOMAIN_ACCESS:-access.oai.org}
 DOMAIN_CORE=${DOMAIN_CORE:-core.oai.org}
+UE_MTU=${UE_MTU:-1358}
 NSSAI_SST0=${NSSAI_SST0:-222}
 NSSAI_SD0=${NSSAI_SD0:-123}
 NSSAI_SST1=${NSSAI_SST1:-1}