Add Oh My Pi and improve dev container config

- Install @oh-my-pi/pi-coding-agent and move Go binaries to /usr/local/bin
- Add omp-data volume and make web port configurable via PORT_WEB
- Replace aider self-check with omp in Makefile
- Harden entrypoint: avoid exporting API keys to SSH env and overwrite
  mounted public key into authorized_keys
- Add .dockerignore, simplify .env.example, and document omp in README

vibe-dev/Dockerfile.ubuntu

@@ -20,10 +20,11 @@ RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 RUN curl -fsSL https://bun.sh/install | bash
 RUN curl -fsSL https://go.dev/dl/go1.24.4.linux-amd64.tar.gz | tar -C /usr/local -xzf - \
     && go install golang.org/x/tools/gopls@latest \
-    && go install github.com/go-delve/delve/cmd/dlv@latest
+    && go install github.com/go-delve/delve/cmd/dlv@latest \
+    && mv /root/go/bin/* /usr/local/bin/
 
-# 4. 全局安装 AI 工具
-RUN bun install -g opencode-ai
+# 4. 全局安装 AI 工具 (opencode + oh-my-pi)
+RUN bun install -g opencode-ai @oh-my-pi/pi-coding-agent
 
 # 5. SSH & 目录预设 (为 Zed 准备)
 RUN ssh-keygen -A && \