chore: add DevContainer

.devcontainer/Dockerfile

@@ -0,0 +1,21 @@
+# Dockerfile for DevContainer
+FROM node:20.16.0-bullseye-slim
+
+# Install essential packages
+RUN apt-get update && apt-get install -y \
+    curl \
+    bash \
+    git \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set up PNPM
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+RUN corepack enable && corepack prepare pnpm@9.12.0 --activate
+
+# Create workspace directory
+WORKDIR /workspaces/dokploy
+
+# Set up user permissions
+USER node