RTSP Camera Agent: fix docker dependency and make copy for latest file (

#800)

* fix docker dependency; copy latest file

* rename latest variable

Dockerfile

@@ -37,6 +37,8 @@ WORKDIR /app/socs/
 # Work around https://github.com/pypa/setuptools/issues/4483/ temporarily
 RUN python -m pip install -U "setuptools<71.0.0"
 RUN python -m pip install -r requirements.txt
+RUN python -m pip uninstall -y opencv-python && \
+    python -m pip install opencv-python-headless
 
 # Copy the current directory contents into the container at /app
 COPY . /app/socs/

socs/common/camera.py

@@ -5,6 +5,7 @@
 import glob
 import os
 import re
+import shutil
 from collections import deque
 from datetime import datetime, timezone
 
@@ -182,11 +183,9 @@ def store(self, data):
             del buffer
             self._deque[pos] = (file, None)
 
-        # Update latest symlink
-        link = os.path.join(self.dir, f"latest.{self.suffix}")
-        if os.path.exists(link):
-            os.remove(link)
-        os.symlink(path, link)
+        # Update latest copy
+        latest = os.path.join(self.dir, f"latest.{self.suffix}")
+        shutil.copy2(path, latest)
 
     def fetch_recent(self):
         result = list()