diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 181c399d..8afad6a6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,13 +34,16 @@ jobs:
         sudo apt-get install ccache
         sudo apt-get install lld
  
+    # install clang for LLVM build
+    - name: check clang version
+      run: clang --version
+
     # setup LLVM
     - name: install a specific version of LLVM
       working-directory: ${{github.workspace}}
       run: |
-        git clone https://github.com/llvm/llvm-project.git
+        git clone --depth 1 --branch release/19.x https://github.com/llvm/llvm-project.git
         cd llvm-project
-        git checkout cd70802
         mkdir build && cd build
         cmake -G Ninja ../llvm \
           -DLLVM_ENABLE_PROJECTS="mlir" \
@@ -55,10 +58,16 @@ jobs:
           -DLLVM_ENABLE_LLD=ON \
           -DMLIR_INSTALL_AGGREGATE_OBJECTS=ON \
           -DLLVM_ENABLE_RTTI=ON \
+          -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
+          -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
           -DCMAKE_C_COMPILER_LAUNCHER=ccache \
           -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
 
         cmake --build . --target check-mlir
+        dpkg -l | grep llvm
+        sudo apt-get purge llvm-13
+        sudo apt-get purge llvm-14
+        sudo apt-get purge llvm-15
         
     # setup mlir-cgra
     - name: setup dataflow tool-chain
diff --git a/README.md b/README.md
index 710df7e3..863df2b4 100644
--- a/README.md
+++ b/README.md
@@ -2,18 +2,21 @@
 
 Build LLVM & Neura
 --------------------------------------------------------
- - Clone llvm-project.
-
- - Clone this repo.
-
+ - Clone llvm-project (we prefer llvm-19).
+```sh
+$ git clone --depth 1 --branch release/19.x https://github.com/llvm/llvm-project.git
+```
  - Build LLVM:
-   - Check out to commit `cd70802` (a stable version randomly picked, will sync to the latest version).
-   - Build:
+ > **Note:**  
+> `clang` is optional for building Neura itself, but installing and building `clang` together with `mlir` (by setting `-DLLVM_ENABLE_PROJECTS="clang;mlir"`) ensures that you have a `clang`/`clang++` matching the same LLVM/MLIR version (19).  
+> This is recommended if you want to use `clang++` for C++ to LLVM IR/MLIR workflows and to avoid version mismatch issues.
+
 ```sh
+ $ cd llvm-project
  $ mkdir build && cd build
  # May need install ccache and lld.
  $ cmake -G Ninja ../llvm \
-     -DLLVM_ENABLE_PROJECTS="mlir" \
+     -DLLVM_ENABLE_PROJECTS="clang;mlir" \
      -DLLVM_BUILD_EXAMPLES=OFF \
      -DLLVM_TARGETS_TO_BUILD="Native" \
      -DCMAKE_BUILD_TYPE=Release \
@@ -25,9 +28,14 @@ Build LLVM & Neura
      -DLLVM_ENABLE_LLD=ON \
      -DMLIR_INSTALL_AGGREGATE_OBJECTS=ON \
      -DLLVM_ENABLE_RTTI=ON \
+     -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
+     -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
      -DCMAKE_C_COMPILER_LAUNCHER=ccache \
      -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
  $ cmake --build . --target check-mlir
+ $ ninja
+ $ ninja check-clang check-mlir
+ $ export PATH=/workspace/llvm-project/build/bin:$PATH
 ```
 
  - Build Neura:
@@ -54,3 +62,24 @@ Build LLVM & Neura
  $ /workspace/llvm-project/build/bin/llvm-lit *
 ```
 
+Docker-based Environment Setup
+--------------------------------------------------------
+**Option 1: Pull Pre-built Image**
+
+You can directly pull and use the pre-built Docker image:
+```sh
+$ docker pull cgra/neura:v1
+$ docker run --name myneura -it cgra/neura:v1
+```
+
+**Option 2: Build Image from Dockerfile**
+
+Alternatively, you can build the Docker image yourself using the provided Dockerfile:
+```sh
+# In the root directory of this repo:
+$ cd docker
+$ docker build -t neura:v1 .
+$ docker run --name myneura -it neura:v1
+```
+
+Both methods will provide a consistent environment with LLVM/MLIR(version 19) and Neura built and ready to use.
diff --git a/docker/Dockerfile b/docker/Dockerfile
new file mode 100644
index 00000000..dda4e3b9
--- /dev/null
+++ b/docker/Dockerfile
@@ -0,0 +1,61 @@
+FROM ubuntu:22.04
+
+SHELL ["/bin/bash", "-c"]
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update \
+	&& apt install software-properties-common -y \
+	&& add-apt-repository ppa:deadsnakes/ppa -y \
+        && apt update \
+        && apt install python3.12 -y \
+	&& apt-get install ninja-build -y \
+	&& apt-get install ccache -y \
+	&& apt-get install lld -y \
+	&& apt-get install -y clang \
+	&& apt-get -y install build-essential cmake git libxml2-dev zlib1g-dev libncurses5-dev \
+	&& mkdir /cgra \
+    	&& cd /cgra \
+	&& git clone https://github.com/yuqisun/dataflow.git \
+	&& cd dataflow \
+	&& until git clone --depth 1 --branch release/19.x https://github.com/llvm/llvm-project.git; do sleep 5; done \
+	&& cd llvm-project \
+	&& mkdir build && cd build \
+	&& cmake -G Ninja ../llvm \
+          -DLLVM_ENABLE_PROJECTS="clang;mlir" \
+          -DLLVM_BUILD_EXAMPLES=OFF \
+          -DLLVM_TARGETS_TO_BUILD="Native" \
+          -DCMAKE_BUILD_TYPE=Release \
+          -DLLVM_ENABLE_ASSERTIONS=ON \
+          -DCMAKE_C_COMPILER=clang \
+          -DCMAKE_CXX_COMPILER=clang++ \
+          -DCMAKE_CXX_STANDARD=17 \
+          -DCMAKE_CXX_FLAGS="-std=c++17 -frtti" \
+          -DLLVM_ENABLE_LLD=ON \
+          -DMLIR_INSTALL_AGGREGATE_OBJECTS=ON \
+          -DLLVM_ENABLE_RTTI=ON \
+          -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
+		  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+	# && cmake --build . --target check-mlir \
+	&& ninja \
+	&& ninja check-clang check-mlir \
+	&& dpkg -l | grep llvm \
+	&& cd /cgra/dataflow \
+	&& mkdir build && cd build \
+	&& cmake -G Ninja .. \
+          -DLLVM_DIR=/cgra/dataflow/llvm-project/build/lib/cmake/llvm \
+          -DMLIR_DIR=/cgra/dataflow/llvm-project/build/lib/cmake/mlir \
+          -DMLIR_SOURCE_DIR=/cgra/dataflow/llvm-project/mlir \
+          -DMLIR_BINARY_DIR=/cgra/dataflow/llvm-project/build \
+          -DCMAKE_CXX_FLAGS="-std=c++17" \
+	&& ninja \
+	&& cd /cgra/dataflow/test \
+	&& /cgra/dataflow/llvm-project/build/bin/llvm-lit * -v
+
+ENV PATH=/cgra/dataflow/llvm-project/build/bin:$PATH
+
+CMD ["tail", "-f", "/dev/null"]
+
+
diff --git a/test/c2llvm2mlir/test.mlir b/test/c2llvm2mlir/test.mlir
index fb0bbb78..738a92c4 100644
--- a/test/c2llvm2mlir/test.mlir
+++ b/test/c2llvm2mlir/test.mlir
@@ -1,3 +1,9 @@
+// Note: 
+// We recommend using the clang++ built from the same LLVM/MLIR 19.x source.
+// Please add your build directory to PATH before running tests:
+// `export PATH=/path/to/llvm-project/build/bin:$PATH`
+// This ensures all clang++ invocations use the same version.
+
 // Compiles the original kernel.
 // RUN: clang++ kernel.cpp -o %t-kernel.out