Add system dependencies required by RapidOCR to fix Khoj Docker image

[kxnarak]

Issue

The Khoj docker build would fail with ImportError: libGL.so.1: cannot open shared object file: No such file or directory. This was required by the Khoj RapidOCR python package dependency.

Stacktrace

khoj-server-1    | Traceback (most recent call last):
khoj-server-1    |   File "/app/src/khoj/main.py", line 93, in <module>
khoj-server-1    |     from khoj.configure import configure_routes, initialize_server, configure_middleware
khoj-server-1    |   File "/app/src/khoj/configure.py", line 40, in <module>
khoj-server-1    |     from khoj.routers.indexer import configure_content, configure_search
khoj-server-1    |   File "/app/src/khoj/routers/indexer.py", line 12, in <module>
khoj-server-1    |     from khoj.processor.content.images.image_to_entries import ImageToEntries
khoj-server-1    |   File "/app/src/khoj/processor/content/images/image_to_entries.py", line 7, in <module>
khoj-server-1    |     from rapidocr_onnxruntime import RapidOCR
khoj-server-1    |   File "/usr/local/lib/python3.10/dist-packages/rapidocr_onnxruntime/__init__.py", line 4, in <module>
khoj-server-1    |     from .main import RapidOCR
khoj-server-1    |   File "/usr/local/lib/python3.10/dist-packages/rapidocr_onnxruntime/main.py", line 8, in <module>
khoj-server-1    |     import cv2
khoj-server-1    |   File "/usr/local/lib/python3.10/dist-packages/cv2/__init__.py", line 181, in <module>
khoj-server-1    |     bootstrap()
khoj-server-1    |   File "/usr/local/lib/python3.10/dist-packages/cv2/__init__.py", line 153, in bootstrap
khoj-server-1    |     native_module = importlib.import_module("cv2")
khoj-server-1    |   File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
khoj-server-1    |     return _bootstrap._gcd_import(name[level:], package, level)
khoj-server-1    | ImportError: libGL.so.1: cannot open shared object file: No such file or directory
khoj-server-1 exited with code 1

Fix

A minimal set of system packages have been added to resolve this issue.

[debanjum]

Thanks for fixing the Khoj docker build! Verified these changes fix the LibGL system dependency missing error required by rapidOCR