Setup Docker builds and optimize Dockerfile layers (#33)

* feat(ci): Setup docker builds for GUI

* refactor(ci):  Split dockerfile into layers

apps/gui/Dockerfile

@@ -0,0 +1,59 @@
+FROM node:22-slim AS base
+ENV PNPM_HOME="/pnpm" \
+    PATH="$PNPM_HOME:$PATH"
+RUN corepack enable && corepack prepare pnpm@11.13.0 --activate
+WORKDIR /app
+
+FROM base AS build-deps
+RUN apt-get update -qq && \
+    apt-get install -qq -y --no-install-recommends \
+    python3 make g++ && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY pnpm-lock.yaml pnpm-workspace.yaml ./
+COPY package.json tsconfig.json tsconfig.base.json ./
+COPY apps/gui/package.json apps/gui/package.json
+COPY apps/gui/tsconfig.json apps/gui/tsconfig.json
+COPY apps/gui/next.config.ts apps/gui/next.config.ts
+COPY apps/gui/postcss.config.mjs apps/gui/postcss.config.mjs
+COPY apps/gui/components.json apps/gui/components.json
+COPY packages/actor/package.json packages/actor/package.json
+COPY packages/architect/package.json packages/architect/package.json
+COPY packages/core/package.json packages/core/package.json
+COPY packages/intent/package.json packages/intent/package.json
+COPY packages/llm/package.json packages/llm/package.json
+COPY packages/memory/package.json packages/memory/package.json
+COPY packages/scenario/package.json packages/scenario/package.json
+COPY packages/spatial/package.json packages/spatial/package.json
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store \
+    pnpm install --frozen-lockfile
+
+FROM build-deps AS pkg-builder
+COPY packages/ ./packages/
+RUN pnpm build
+
+FROM pkg-builder AS gui-builder
+COPY apps/gui/src ./apps/gui/src
+COPY apps/gui/public ./apps/gui/public
+RUN pnpm --filter @omnia/gui build
+
+FROM base AS runner
+ENV NODE_ENV=production
+RUN apt-get update -qq && \
+    apt-get install -qq -y --no-install-recommends \
+    python3 make g++ && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=gui-builder /app/package.json /app/pnpm-workspace.yaml ./
+COPY --from=gui-builder /app/node_modules ./node_modules
+COPY --from=gui-builder /app/packages ./packages
+COPY --from=gui-builder /app/apps/gui/package.json \
+    /app/apps/gui/next.config.ts \
+    /app/apps/gui/postcss.config.mjs \
+    ./apps/gui/
+COPY --from=gui-builder /app/apps/gui/.next ./apps/gui/.next
+COPY --from=gui-builder /app/apps/gui/public ./apps/gui/public
+
+WORKDIR /app/apps/gui
+EXPOSE 3000
+CMD ["pnpm", "start"]