Add Docker and Gitea Actions CI/CD pipeline

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/Dockerfile

@@ -0,0 +1,28 @@
+FROM node:22-slim AS base
+RUN corepack enable && corepack prepare pnpm@10.33.0 --activate
+WORKDIR /app
+
+FROM base AS deps
+COPY pnpm-lock.yaml pnpm-workspace.yaml package.json ./
+COPY packages/shared/package.json packages/shared/
+COPY packages/tsconfig/package.json packages/tsconfig/
+COPY packages/game-engine/package.json packages/game-engine/
+COPY apps/web/package.json apps/web/
+RUN pnpm install --frozen-lockfile
+
+FROM base AS build
+COPY --from=deps /app/node_modules ./node_modules
+COPY --from=deps /app/packages/shared/node_modules ./packages/shared/node_modules
+COPY --from=deps /app/packages/game-engine/node_modules ./packages/game-engine/node_modules
+COPY --from=deps /app/apps/web/node_modules ./apps/web/node_modules
+COPY . .
+ARG VITE_API_URL=/api
+ENV VITE_API_URL=$VITE_API_URL
+RUN pnpm --filter @ai-tycoon/shared build && \
+    pnpm --filter @ai-tycoon/game-engine build && \
+    pnpm --filter @ai-tycoon/web build
+
+FROM nginx:alpine
+COPY --from=build /app/apps/web/dist /usr/share/nginx/html
+COPY apps/web/nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80