first working demo

Dockerfile

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+# syntax = docker/dockerfile:1
+
+# Adjust NODE_VERSION as desired
+ARG NODE_VERSION=22.12.0
+FROM node:${NODE_VERSION}-slim AS base
+
+LABEL fly_launch_runtime="SvelteKit"
+
+# SvelteKit app lives here
+WORKDIR /app
+
+# Set production environment
+ENV NODE_ENV="production"
+
+
+# Throw-away build stage to reduce size of final image
+FROM base AS build
+
+# Install packages needed to build node modules
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential node-gyp pkg-config python-is-python3
+
+# Install node modules
+COPY .npmrc package-lock.json package.json ./
+RUN npm ci --include=dev
+
+# Copy application code
+COPY . .
+
+# Build application
+RUN npm run build
+
+# Remove development dependencies
+RUN npm prune --omit=dev
+
+
+# Final stage for app image
+FROM base
+
+# Copy built application
+COPY --from=build /app/build /app/build
+COPY --from=build /app/node_modules /app/node_modules
+COPY --from=build /app/package.json /app
+
+# Start the server by default, this can be overwritten at runtime
+EXPOSE 3000
+CMD [ "node", "./build/index.js" ]