diff --git a/Dockerfile b/Dockerfile
index 93a0504..0fe3da6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,19 +5,19 @@ WORKDIR /app
 # Install uv
 RUN pip install --no-cache-dir uv
 
-# Copy project files
+# Install dependencies first (cached unless the lockfile changes)
 COPY pyproject.toml uv.lock ./
-
-# Install dependencies with uv
-RUN uv sync --no-editable
+RUN uv sync --frozen --no-install-project
 
 # Copy source code
-COPY solve.py web_solve.py ./
-COPY templates/ templates/
+COPY solve.py main.py index.html ./
 
-# Set environment variables
-ENV FLASK_APP=web_solve.py
-ENV PYTHONUNBUFFERED=1
+# Bind to all interfaces so the server is reachable outside the container
+ENV HOST=0.0.0.0 \
+    PORT=8000 \
+    PYTHONUNBUFFERED=1
 
-# Run Flask app
-CMD ["uv", "run", "python", "web_solve.py"]
+EXPOSE 8000
+
+# Run the stdlib HTTP server
+CMD ["uv", "run", "--frozen", "python", "main.py"]
diff --git a/docker-compose.yml b/docker-compose.yml
index 6ad89a1..e3f59d6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,14 +1,9 @@
-version: '3.8'
-
 services:
   web:
     build: .
     ports:
-      - "5555:5000"
+      - "8000:8000"
     environment:
-      - FLASK_ENV=development
-      - FLASK_DEBUG=1
-    volumes:
-      - .:/app
-    command: uv run python web_solve.py
+      - HOST=0.0.0.0
+      - PORT=8000
     restart: unless-stopped
diff --git a/main.py b/main.py
index 6f2e7b4..3ce30e5 100644
--- a/main.py
+++ b/main.py
@@ -13,6 +13,7 @@ once, then calls it over the amounts it needs (0..max_resource) to build the
 from __future__ import annotations
 
 import json
+import os
 from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 from pathlib import Path
 
@@ -58,7 +59,8 @@ class Handler(BaseHTTPRequestHandler):
 
 
 def main():
-    host, port = "127.0.0.1", 8000
+    host = os.environ.get("HOST", "127.0.0.1")
+    port = int(os.environ.get("PORT", "8000"))
     server = ThreadingHTTPServer((host, port), Handler)
     print(f"Days Without Strife planner UI: http://{host}:{port}")
     try: