added entrypoint for Reticulum in Docker

Replaces static CMD with an entrypoint that generates RNS config from
environment variables (RNS_TCP_HOST/PORT), enabling TCP transport for
environments without LAN auto-discovery (e.g. Docker on macOS).

Dockerfile

@@ -11,6 +11,8 @@ RUN mkdir -p /data \
     && ln -sf /data/index.db index.db \
     && ln -sf /data/tinyweb_identity tinyweb_identity
 
+ENV PYTHONUNBUFFERED=1
+
 EXPOSE 8080
 
-CMD ["python", "app.py"]
+ENTRYPOINT ["./entrypoint.sh"]

app.py

@@ -42,7 +42,7 @@ def start_gateway(reticulum):
 
 def main():
     init_db()
-    reticulum = RNS.Reticulum()
+    reticulum = RNS.Reticulum(configdir=os.environ.get("RNS_CONFIG_DIR"))
     identity = load_or_create_identity()
 
     destination = RNS.Destination(

docker-compose.yml

@@ -6,6 +6,12 @@ services:
     volumes:
       - tinyweb-data:/data
     restart: unless-stopped
+    # Connect to another Reticulum instance over TCP.
+    # Required on macOS (Docker can't do LAN auto-discovery).
+    # On Linux, auto-discovery works with network_mode: host.
+    # environment:
+    #   - RNS_TCP_HOST=10.0.0.100
+    #   - RNS_TCP_PORT=4242
 
 volumes:
   tinyweb-data:

entrypoint.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+# Generate Reticulum config with optional TCP peer
+# Set RNS_TCP_HOST and RNS_TCP_PORT env vars to connect to a remote instance
+
+CONFIG_DIR="/data/.reticulum"
+CONFIG_FILE="$CONFIG_DIR/config"
+
+mkdir -p "$CONFIG_DIR"
+
+if [ ! -f "$CONFIG_FILE" ]; then
+  cat > "$CONFIG_FILE" <<EOF
+[reticulum]
+  enable_transport = False
+  share_instance = Yes
+
+[logging]
+  loglevel = 4
+
+[interfaces]
+  [[Default Interface]]
+    type = AutoInterface
+    enabled = Yes
+EOF
+
+  if [ -n "$RNS_TCP_HOST" ]; then
+    RNS_TCP_PORT="${RNS_TCP_PORT:-4242}"
+    cat >> "$CONFIG_FILE" <<EOF
+
+  [[TCP Link]]
+    type = TCPClientInterface
+    enabled = yes
+    target_host = $RNS_TCP_HOST
+    target_port = $RNS_TCP_PORT
+EOF
+  fi
+fi
+
+export RNS_CONFIG_DIR="$CONFIG_DIR"
+exec python app.py