Update Dockerfile

Dockerfile

@@ -35,17 +35,13 @@ RUN git clone https://github.com/searx/searx.git /usr/local/searx/searx-src
 RUN python3 -m venv /usr/local/searx/searx-pyenv && \
     echo ". /usr/local/searx/searx-pyenv/bin/activate" >> /usr/local/searx/.profile
 
-# Activate virtual environment and install upgraded pip, setuptools, wheel
+# Activate virtual environment and install a stable version of pyyaml
 RUN . /usr/local/searx/searx-pyenv/bin/activate && \
-    pip install -U pip setuptools wheel
+    pip install pyyaml==5.4.1
 
-# Install setuptools_scm and cython explicitly
+# Install upgraded pip, setuptools, wheel, and setuptools_scm, cython
 RUN . /usr/local/searx/searx-pyenv/bin/activate && \
-    pip install setuptools_scm cython
-
-# Install pyyaml separately
-RUN . /usr/local/searx/searx-pyenv/bin/activate && \
-    pip install pyyaml
+    pip install -U pip setuptools wheel setuptools_scm cython
 
 # Install searx dependencies
 RUN . /usr/local/searx/searx-pyenv/bin/activate && \