refactor: optimize Dockerfile build process

- Combined multiple build commands into a single RUN command using background execution and wait to improve build efficiency.
- Ensured that builds for @afilmory/web, @afilmory/dashboard, and core are executed concurrently.

Signed-off-by: Innei <tukon479@gmail.com>

Author: Innei

Dockerfile.core

@@ -21,9 +21,10 @@ RUN pnpm fetch --filter '@afilmory/dashboard...'
 COPY . .
 
 RUN pnpm install --filter core... --filter '@afilmory/web...' --filter '@afilmory/dashboard...' --frozen-lockfile
-RUN pnpm --filter @afilmory/web build:serve
-RUN pnpm --filter @afilmory/dashboard build
-RUN pnpm --filter core build
+RUN pnpm --filter @afilmory/web build:serve & \
+    pnpm --filter @afilmory/dashboard build & \
+    pnpm --filter core build & \
+    wait
 RUN mkdir -p be/apps/core/dist/static/web && cp -r apps/web/dist/* be/apps/core/dist/static/web/
 RUN mkdir -p be/apps/core/dist/static/dashboard && cp -r be/apps/dashboard/dist/* be/apps/core/dist/static/dashboard/