feat(backend): support partial/conditional builds in Dockerfile

backend/Dockerfile

@@ -1,32 +1,41 @@
-FROM oven/bun:1.2.18 AS website-builder
-WORKDIR /website
-COPY website/package.json ./
-RUN bun install
-COPY website/ .
-RUN bun run build
+FROM oven/bun:1.2.18 AS builder
+WORKDIR /build
 
-FROM oven/bun:1.2.18 AS mobile-builder
-WORKDIR /mobile
-COPY mobile/package.json ./
-RUN bun install
-COPY mobile/ .
-RUN bun run build:web
+# Copy the entire build context (which contains whatever project folders exist)
+COPY . .
 
-FROM oven/bun:1.2.18 AS games-builder
-WORKDIR /games
-COPY games/package.json ./
-RUN bun install
-COPY games/ .
-RUN bun run build
+# Conditionally build website if present
+RUN if [ -d "website" ]; then \
+      cd website && bun install && bun run build && cd ..; \
+    fi
+
+# Conditionally build mobile if present
+RUN if [ -d "mobile" ]; then \
+      cd mobile && bun install && bun run build:web && cd ..; \
+    fi
+
+# Conditionally build games if present
+RUN if [ -d "games" ]; then \
+      cd games && bun install && bun run build && cd ..; \
+    fi
 
 FROM oven/bun:1.2.18
 WORKDIR /app
+
+# Copy backend configuration and install production dependencies
 COPY backend/package.json backend/bun.lock backend/tsconfig.json ./
 RUN bun install --frozen-lockfile --production
+
+# Copy backend source code
 COPY backend/src ./src
-COPY --from=website-builder /website/dist ./public
-COPY --from=mobile-builder /mobile/dist ./public/mobile
-COPY --from=games-builder /games/dist ./public/games
+
+# Create public assets directories
+RUN mkdir -p public public/mobile public/games
+
+# Conditionally copy build assets from the builder stage if they exist
+RUN if [ -d "/build/website/dist" ]; then cp -r /build/website/dist/* ./public/; fi
+RUN if [ -d "/build/mobile/dist" ]; then cp -r /build/mobile/dist/* ./public/mobile/; fi
+RUN if [ -d "/build/games/dist" ]; then cp -r /build/games/dist/* ./public/games/; fi
 
 ENV NODE_ENV=production
 ENV PORT=8080