Add E2B.

backend/container/e2b.Dockerfile

@@ -0,0 +1,19 @@
+# e2b template build --name "terminal"
+
+# Use a Debian-based base image
+FROM ubuntu:22.04
+
+# Install dependencies and customize sandbox
+RUN apt update \
+    && apt install -y sudo
+
+# Install xterm
+RUN apt update \
+    && apt install -y xterm
+
+RUN apt update \
+    && apt install -y tmux screen
+
+# Clean up
+RUN apt clean \
+    && rm -rf /var/lib/apt/lists/*