fix: stabilize im server startup and p2p topic scans

docker/tinode/Dockerfile

@@ -41,7 +41,7 @@ ENV RESET_DB=false
 ENV UPGRADE_DB=false
 
 # Option to skip DB initialization when it's missing.
-ENV NO_DB_INIT=false
+ENV NO_DB_INIT=true
 
 # Load sample data to database from data.json.
 ARG SAMPLE_DATA=data.json
@@ -130,7 +130,7 @@ ENV TNPG_ORG=
 
 # Video calls configuration.
 ENV WEBRTC_ENABLED=false
-ENV ICE_SERVERS_FILE=
+ENV ICE_SERVERS_FILE=/opt/tinode/ice-servers.json
 
 # Use the target db by default.
 # When TARGET_DB is "alldbs", it is the user's responsibility
@@ -153,6 +153,7 @@ WORKDIR /opt/tinode
 # Copy config template to the container.
 COPY config.template .
 COPY entrypoint.sh .
+COPY ice-servers.json .
 
 # Get the desired Tinode build.
 ADD https://github.com/tinode/chat/releases/download/v$BINVERS/tinode-$TARGET_DB.linux-amd64.tar.gz .