feat: Delete http_api_reference.md from api folder #1102 (#3121)

### What problem does this PR solve?

feat: Delete http_api_reference.md from  api folder #1102

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Dockerfile.slim

@@ -47,9 +47,9 @@ RUN --mount=type=cache,id=ragflow_builder_apt,target=/var/cache/apt,sharing=lock
     rm -rf /var/lib/apt/lists/*
 
 COPY web web
-COPY api api
+COPY docs docs
 RUN --mount=type=cache,id=ragflow_builder_npm,target=/root/.npm,sharing=locked \
-    cd web && npm i --force && npm run build
+    cd web && npm i && npm run build
 
 # install dependencies from poetry.lock file
 COPY pyproject.toml poetry.toml poetry.lock ./