fix(jigasi): ensure tpl doesn't fail even if no JIGASI_SIP_PASSWORD is set (#1943)

jigasi/rootfs/defaults/sipserver-sip-communicator.properties

@@ -1,4 +1,5 @@
 {{ $ENABLE_VISITORS := .Env.ENABLE_VISITORS | default "0" | toBool -}}
+{{ $JIGASI_SIP_PASSWORD := .Env.JIGASI_SIP_PASSWORD | default "replaceme" -}}
 {{ $JIGASI_XMPP_USER := .Env.JIGASI_XMPP_USER | default "jigasi" -}}
 {{ $XMPP_AUTH_DOMAIN := .Env.XMPP_AUTH_DOMAIN | default "auth.meet.jitsi" -}}
 {{ $XMPP_DOMAIN := .Env.XMPP_DOMAIN | default "meet.jitsi" -}}
@@ -28,7 +29,7 @@ net.java.sip.communicator.impl.protocol.sip.acc1.ENCRYPTION_PROTOCOL_STATUS.DTLS
 net.java.sip.communicator.impl.protocol.sip.acc1.SDES_CIPHER_SUITES=AES_CM_128_HMAC_SHA1_80,AES_CM_128_HMAC_SHA1_32
 {{ end }}
 net.java.sip.communicator.impl.protocol.sip.acc1.ACCOUNT_UID=SIP\:{{ .Env.JIGASI_SIP_URI }}
-net.java.sip.communicator.impl.protocol.sip.acc1.PASSWORD={{ .Env.JIGASI_SIP_PASSWORD | b64enc }}
+net.java.sip.communicator.impl.protocol.sip.acc1.PASSWORD={{ $JIGASI_SIP_PASSWORD | b64enc }}
 net.java.sip.communicator.impl.protocol.sip.acc1.PROTOCOL_NAME=SIP
 net.java.sip.communicator.impl.protocol.sip.acc1.SERVER_ADDRESS={{ .Env.JIGASI_SIP_SERVER }}
 net.java.sip.communicator.impl.protocol.sip.acc1.USER_ID={{ .Env.JIGASI_SIP_URI }}