feat: add pi agent provider

bot_bottle/contrib/pi/Dockerfile

@@ -0,0 +1,23 @@
+# bot-bottle Pi provider image.
+#
+# Node LTS, git/network tooling, and the Pi coding-agent CLI installed globally.
+
+FROM node:22-slim
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends git ca-certificates curl \
+  && rm -rf /var/lib/apt/lists/*
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends python3 python3-pip python3-venv \
+  && rm -rf /var/lib/apt/lists/*
+
+RUN npm install -g --ignore-scripts --no-fund --no-audit @earendil-works/pi-coding-agent \
+  && npm cache clean --force
+
+USER node
+WORKDIR /home/node
+
+RUN mkdir -p /home/node/.pi/agent
+
+CMD ["pi"]