Move npm build to Docker image build time (#4636)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile.ui

@@ -1,5 +1,8 @@
 FROM node:20.12-slim
 
+# Install tini for proper signal handling and zombie reaping
+RUN apt-get update && apt-get install -y --no-install-recommends tini && rm -rf /var/lib/apt/lists/*
+
 WORKDIR /app
 COPY ./skyvern-frontend /app
 COPY ./entrypoint-skyvernui.sh /app/entrypoint-skyvernui.sh
@@ -8,6 +11,13 @@ RUN npm install
 ENV VITE_API_BASE_URL=http://localhost:8000/api/v1
 ENV VITE_WSS_BASE_URL=ws://localhost:8000/api/v1
 ENV VITE_ARTIFACT_API_BASE_URL=http://localhost:9090
+# Placeholder for runtime injection
+ENV VITE_SKYVERN_API_KEY=__SKYVERN_API_KEY_PLACEHOLDER__
 
+# Build at image time
+RUN npm run build
+
+# Use tini as init for proper signal handling and zombie reaping
+ENTRYPOINT ["/usr/bin/tini", "--"]
 CMD ["/bin/bash", "/app/entrypoint-skyvernui.sh"]
 

entrypoint-skyvernui.sh

@@ -2,9 +2,16 @@
 
 set -e
 
-# setting api key
-VITE_SKYVERN_API_KEY=$(sed -n 's/.*cred\s*=\s*"\([^"]*\)".*/\1/p' .streamlit/secrets.toml)
-export VITE_SKYVERN_API_KEY
-npm run start
+# Extract API key from secrets file
+VITE_SKYVERN_API_KEY=$(sed -n 's/.*cred\s*=\s*"\([^"]*\)".*/\1/p' .streamlit/secrets.toml 2>/dev/null || echo "")
 
+# Inject API key into pre-built JS files (replace placeholder)
+if [ -n "$VITE_SKYVERN_API_KEY" ]; then
+    find /app/dist -name "*.js" -exec sed -i "s/__SKYVERN_API_KEY_PLACEHOLDER__/$VITE_SKYVERN_API_KEY/g" {} \;
+fi
 
+# Start the servers (no rebuild needed)
+# Tini (configured as ENTRYPOINT) handles signal forwarding and zombie reaping
+node localServer.js &
+node artifactServer.js &
+wait