Add headless Agentbox environment spike

Co-authored-by: codegirl007 <codegirl-007@users.noreply.github.com>

agentbox/environment/Dockerfile

@@ -0,0 +1,31 @@
+FROM debian:bookworm-slim AS builder
+
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        build-essential \
+        libx11-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY examples/mover/main.c /src/main.c
+RUN cc -std=c11 -O2 -Wall -Wextra -Werror /src/main.c -lX11 -o /mover
+
+FROM debian:bookworm-slim
+
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        libx11-6 \
+        openbox \
+        scrot \
+        x11-utils \
+        xdotool \
+        xvfb \
+    && rm -rf /var/lib/apt/lists/* \
+    && useradd --create-home --uid 10001 agentbox
+
+COPY --from=builder /mover /opt/agentbox/mover
+COPY environment/entrypoint.sh /opt/agentbox/entrypoint.sh
+RUN chmod 0755 /opt/agentbox/entrypoint.sh /opt/agentbox/mover
+
+USER agentbox
+ENV DISPLAY=:99
+ENTRYPOINT ["/opt/agentbox/entrypoint.sh"]