misc: add configurable service restart policy

docker-compose.yml

@@ -4,6 +4,7 @@ services:
     # Frontend
     web:
         image: jitsi/web
+        restart: ${RESTART_POLICY}
         ports:
             - '${HTTP_PORT}:80'
             - '${HTTPS_PORT}:443'
@@ -45,6 +46,7 @@ services:
     # XMPP server
     prosody:
         image: jitsi/prosody
+        restart: ${RESTART_POLICY}
         expose:
             - '5222'
             - '5347'
@@ -108,6 +110,7 @@ services:
     # Focus component
     jicofo:
         image: jitsi/jicofo
+        restart: ${RESTART_POLICY}
         volumes:
             - ${CONFIG}/jicofo:/config
         environment:
@@ -134,6 +137,7 @@ services:
     # Video bridge
     jvb:
         image: jitsi/jvb
+        restart: ${RESTART_POLICY}
         ports:
             - '${JVB_PORT}:${JVB_PORT}/udp'
             - '${JVB_TCP_PORT}:${JVB_TCP_PORT}'