Fix pusher and back locked

Due to the "messages" container changing .ts files at the very same time Typescript is compiling, ts-node-dev can end up in a "locked" state.
This is a bug in ts-node-dev.

To avoid issues, I am adding a small 5 seconds delay in pusher and back startup. This should allow (at least on my hardware) enough time for messages to be generated.

docker-compose.yaml

@@ -73,7 +73,7 @@ services:
       DEBUG: "socket:*"
       STARTUP_COMMAND_1: yarn install
       # wait for files generated by "messages" container to exists
-      STARTUP_COMMAND_2: while [ ! -f /usr/src/app/src/Messages/generated/messages_pb.js ]; do sleep 1; done
+      STARTUP_COMMAND_2: sleep 5; while [ ! -f /usr/src/app/src/Messages/generated/messages_pb.js ]; do sleep 1; done
       SECRET_JITSI_KEY: "$SECRET_JITSI_KEY"
       SECRET_KEY: yourSecretKey
       ADMIN_API_TOKEN: "$ADMIN_API_TOKEN"
@@ -132,7 +132,7 @@ services:
       DEBUG: "*"
       STARTUP_COMMAND_1: yarn install
       # wait for files generated by "messages" container to exists
-      STARTUP_COMMAND_2: while [ ! -f /usr/src/app/src/Messages/generated/messages_pb.js ]; do sleep 1; done
+      STARTUP_COMMAND_2: sleep 5; while [ ! -f /usr/src/app/src/Messages/generated/messages_pb.js ]; do sleep 1; done
       SECRET_KEY: yourSecretKey
       SECRET_JITSI_KEY: "$SECRET_JITSI_KEY"
       ALLOW_ARTILLERY: "true"