chore: import upstream snapshot with attribution

.devcontainer/Dockerfile

@@ -0,0 +1,47 @@
+FROM oven/bun:1.3.13-alpine
+
+# Install necessary packages for development
+RUN apk add --no-cache \
+    git \
+    curl \
+    wget \
+    jq \
+    sudo \
+    postgresql-client \
+    vim \
+    nano \
+    bash \
+    bash-completion \
+    zsh \
+    zsh-vcs \
+    ca-certificates \
+    shadow
+
+# Create a non-root user with matching UID/GID
+ARG USERNAME=bun
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Create user group if it doesn't exist
+RUN if ! getent group $USER_GID >/dev/null; then \
+        addgroup -g $USER_GID $USERNAME; \
+    fi
+
+# Create user if it doesn't exist
+RUN if ! getent passwd $USER_UID >/dev/null; then \
+        adduser -D -u $USER_UID -G $(getent group $USER_GID | cut -d: -f1) $USERNAME; \
+    fi
+
+# Add sudo support
+RUN echo "$USERNAME ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+# Set up shell environment
+RUN echo "export PATH=\$PATH:/home/$USERNAME/.bun/bin" >> /etc/profile
+
+WORKDIR /workspace
+
+# Expose the ports we're interested in
+EXPOSE 3000
+EXPOSE 3001
+EXPOSE 3002