diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..e30bbdd
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,27 @@
+FROM python:3.12-slim
+
+# Install build dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Set working directory
+WORKDIR /app
+
+# Copy project files
+COPY . .
+
+# Install PyYAML and websockets into __pypackages__/3.12/lib
+RUN mkdir -p __pypackages__/3.12/lib && \
+    PYTHONPATH=__pypackages__/3.12/lib \
+    pip install --no-cache-dir --target=__pypackages__/3.12/lib \
+    PyYAML==6.0.2 websockets==15.0.1
+
+# Build the web version
+RUN pygbag --build main.py
+
+# Expose the desired port
+EXPOSE 3010
+
+# Serve the build output
+WORKDIR /app/build/web
+CMD ["python", "-m", "http.server", "3010"]
diff --git a/requirements.txt b/requirements.txt
index 2e4af92..92cde3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,2 @@
-asarPy==1.0.1
 pygame==2.5.2
 pygbag==0.9.2
-PyYAML==6.0.2
-websockets==15.0.1
diff --git a/tetri5/online.py b/tetri5/online.py
index 07fedfa..4f2f9b0 100644
--- a/tetri5/online.py
+++ b/tetri5/online.py
@@ -1,6 +1,6 @@
 import sys
 sys.path.append("__pypackages__/3.12/lib/")
-import websockets
+import websockets # non-native package
 
 import asyncio
 import json