Fix README and some comments (#2774)

### What problem does this PR solve?

1. Fix typo
2. Update comments.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Signed-off-by: Jin Hai <[email protected]>

Dockerfile

@@ -13,7 +13,7 @@ RUN rm -f /etc/apt/apt.conf.d/docker-clean \
 RUN --mount=type=cache,id=ragflow_base_apt,target=/var/cache/apt,sharing=locked \
     apt update && apt-get --no-install-recommends install -y ca-certificates
 
-# If you are at mainland China, you can use tsinghua mirror to speed up apt and poetry
+# If you download Python modules too slow, you can use a pip mirror site to speed up apt and poetry
 RUN sed -i 's|http://archive.ubuntu.com|https://mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list.d/ubuntu.sources
 ENV POETRY_PYPI_MIRROR_URL=https://pypi.tuna.tsinghua.edu.cn/simple/
 

Dockerfile.slim

@@ -13,7 +13,7 @@ RUN rm -f /etc/apt/apt.conf.d/docker-clean \
 RUN --mount=type=cache,id=ragflow_base_apt,target=/var/cache/apt,sharing=locked \
     apt update && apt-get --no-install-recommends install -y ca-certificates
 
-# If you are at mainland China, you can use tsinghua mirror to speed up apt and poetry
+# If you download Python modules too slow, you can use a pip mirror site to speed up apt and poetry
 RUN sed -i 's|http://archive.ubuntu.com|https://mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list.d/ubuntu.sources
 ENV POETRY_PYPI_MIRROR_URL=https://pypi.tuna.tsinghua.edu.cn/simple/
 

README.md

@@ -153,7 +153,7 @@ Try our demo at [https://demo.ragflow.io](https://demo.ragflow.io).
    ```
 
 3. Build the pre-built Docker images and start up the server:
-   > Running the following commands automatically downloads the *slim-dev* version RAGFlow Docker image. To download and run a specified Docker version, update `RAGFLOW_IMAGE` in **docker/.env** to the intended version, for example `RAGFLOW_IMAGE=infiniflow/ragflow:v0.12.0-slim`, before running the following commands.
+   > Running the following commands automatically downloads the *dev-slim* version RAGFlow Docker image. To download and run a specified Docker version, update `RAGFLOW_IMAGE` in **docker/.env** to the intended version, for example `RAGFLOW_IMAGE=infiniflow/ragflow:v0.12.0-slim`, before running the following commands.
 
    ```bash
    $ cd ragflow/docker

docker/.env

@@ -41,7 +41,7 @@ RAGFLOW_IMAGE=infiniflow/ragflow:dev-slim
 
 TIMEZONE='Asia/Shanghai'
 
-# If inside mainland China, decomment the following huggingface.co mirror:
+# If can't download models, try to uncomment the following huggingface.co mirror:
 # HF_ENDPOINT=https://hf-mirror.com
 
 ######## OS setup for ES ###########

docs/quickstart.mdx

@@ -177,7 +177,7 @@ This section provides instructions on setting up the RAGFlow server on Linux. If
 
 3. Build the pre-built Docker images and start up the server:
 
-   > Running the following commands automatically downloads the *slim-dev* version RAGFlow Docker image. To download and run a specified Docker version, update `RAGFLOW_IMAGE` in **docker/.env** to the intended version, for example `RAGFLOW_IMAGE=infiniflow/ragflow:v0.12.0-slim`, before running the following commands.
+   > Running the following commands automatically downloads the *dev-slim* version RAGFlow Docker image. To download and run a specified Docker version, update `RAGFLOW_IMAGE` in **docker/.env** to the intended version, for example `RAGFLOW_IMAGE=infiniflow/ragflow:v0.12.0-slim`, before running the following commands.
 
    ```bash
    $ cd ragflow/docker