chore: create dev env docker image

Co-authored-by: Ona <no-reply@ona.com>

.devcontainer/Dockerfile

@@ -0,0 +1,32 @@
+FROM mcr.microsoft.com/devcontainers/javascript-node:24
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    curl \
+    ca-certificates \
+    gnupg \
+    lsb-release \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Tailscale
+RUN curl -fsSL https://tailscale.com/install.sh | sh
+
+# Install Bun as the node user
+USER node
+RUN curl -fsSL https://bun.sh/install | bash
+ENV PATH="/home/node/.bun/bin:$PATH"
+
+# Switch back to root for any remaining setup
+USER root
+
+# Ensure the node user owns their home directory
+RUN chown -R node:node /home/node
+
+# Set the default user back to node
+USER node
+
+# Set working directory
+WORKDIR /workspace
+
+# Verify installations
+RUN bun --version && tailscale version