1) Upgraded Gunicorn to version 23.0.0 to address a security vulnerability present in Gunicorn.

2) Resolved an issue where an empty PSQL panel would open if the psql utility was not found in the binary path.

Dockerfile

@@ -208,7 +208,7 @@ RUN apk add --no-cache \
         libedit \
         libldap \
         libcap && \
-    /venv/bin/python3 -m pip install --no-cache-dir gunicorn==22.0.0 && \
+    /venv/bin/python3 -m pip install --no-cache-dir gunicorn==23.0.0 && \
     find / -type d -name '__pycache__' -exec rm -rf {} + && \
     useradd -r -u 5050 -g root -s /sbin/nologin pgadmin && \
     mkdir -p /run/pgadmin /var/lib/pgadmin && \