Add temporary documentation on how to preinstall Debian and Python packages.

Fixes issue #30

Author: EtiennePerot

.vscode/settings.json

@@ -26,9 +26,11 @@
 		"getpid",
 		"gotmp",
 		"gvisor",
+		"iputils",
 		"libc",
 		"libcap",
 		"Lockdown",
+		"matplotlib",
 		"maxsplit",
 		"memfd",
 		"mknod",
@@ -40,6 +42,7 @@
 		"NOFILE",
 		"noninteractive",
 		"nsswitch",
+		"numpy",
 		"openwebui",
 		"pacct",
 		"perfmon",
@@ -87,6 +90,7 @@
 		"urandom",
 		"userspace",
 		"webui",
+		"yfinance",
 		"zswap"
 	],
 	"[python]": {

docs/setup.md

@@ -267,6 +267,27 @@ RUN wget -O /tmp/runsc "https://storage.googleapis.com/gvisor/releases/release/l
 
 </details>
 
+### **Optional**: Add packages to Open WebUI `Dockerfile`
+
+<details>
+<summary>To allow code execution sandboxes to use tools or Python packages that aren't part of the Open WebUI container image, you can preinstall them in the `Dockerfile`.</summary>
+<br/>
+
+For example, here is a sample `Dockerfile` that extends the Open WebUI container image and installs the `sudo` and `ping` tools along with some Python packages:
+
+```Dockerfile
+FROM ghcr.io/open-webui/open-webui:main
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get upgrade -y </dev/null && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+      iputils-ping sudo \
+    </dev/null && \
+    pip install matplotlib yfinance numpy
+```
+
+</details>
+
 ### **Optional**: Lockdown for production setups
 
 <details>