Commit built dist for S3 deployment, revert buildspec to static serving

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

Author: johnebgood

buildspec.yml

@@ -1,16 +1,4 @@
 version: 0.2
-
-phases:
-  install:
-    runtime-versions:
-      nodejs: 20
-    commands:
-      - cd react-app
-      - npm ci
-  build:
-    commands:
-      - npm run build
-
 artifacts:
   files:
     - '**/*'

react-app/.gitignore

@@ -8,7 +8,6 @@ pnpm-debug.log*
 lerna-debug.log*
 
 node_modules
-dist
 dist-ssr
 *.local