Add entrypoint script for optional connection flags

Simple entrypoint script that converts environment variables to
command-line flags only when set:
- BROWSER_URL → --browserUrl
- WS_ENDPOINT → --wsEndpoint
- WS_HEADERS → --wsHeaders

This allows the server.yaml to pass these as env vars without
causing build errors when they're empty.

Author: kgprs

Dockerfile

@@ -45,6 +45,10 @@ WORKDIR /app
 COPY --from=builder /app/build ./build
 COPY --from=builder /app/node_modules ./node_modules
 
+# Copy entrypoint script
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
 # Set environment to tell Puppeteer where Chromium is installed
 ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium
 
@@ -56,5 +60,5 @@ RUN groupadd -r mcpuser && useradd -r -g mcpuser -G audio,video mcpuser \
 
 USER mcpuser
 
-# Expose MCP server via stdio
-ENTRYPOINT ["node", "build/src/index.js"]
+# Use entrypoint script that handles optional connection flags
+ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

docker-entrypoint.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+set -e
+
+# Build command with optional connection arguments
+CMD="node build/src/index.js"
+
+# Add browserUrl if BROWSER_URL is set and not empty
+if [ -n "$BROWSER_URL" ]; then
+  CMD="$CMD --browserUrl $BROWSER_URL"
+fi
+
+# Add wsEndpoint if WS_ENDPOINT is set and not empty
+if [ -n "$WS_ENDPOINT" ]; then
+  CMD="$CMD --wsEndpoint $WS_ENDPOINT"
+fi
+
+# Add wsHeaders if WS_HEADERS is set and not empty
+if [ -n "$WS_HEADERS" ]; then
+  CMD="$CMD --wsHeaders '$WS_HEADERS'"
+fi
+
+# Execute the command with any additional arguments
+exec $CMD "$@"