Add Dockerfile to build and run meshchat

Dockerfile

@@ -0,0 +1,29 @@
+# Build the frontend
+FROM node:20-bookworm-slim AS build-frontend
+
+WORKDIR /src
+
+COPY *.json .
+COPY *.js .
+COPY src/frontend ./src/frontend
+
+RUN npm install --omit=dev && \
+  npm install tailwindcss && \
+  npm run build-frontend
+
+# Main app build
+FROM python:3.11-bookworm
+
+WORKDIR /app
+
+COPY ./requirements.txt .
+COPY --from=build-frontend /src/public public
+
+RUN pip install -r requirements.txt
+
+COPY *.py .
+COPY src/__init__.py ./src/__init__.py
+COPY src/backend ./src/backend
+COPY *.json .
+
+CMD ["python", "meshchat.py", "--host=0.0.0.0", "--reticulum-config-dir=/config/.reticulum", "--headless"]