Persistency seems to work with this model, it has succeeded my tests.

docker/Dockerfile

@@ -20,7 +20,7 @@ RUN ln -sf /usr/share/zoneinfo/${tz} /etc/localtime \
 # Removing the linux-image package to preserve space on the container.
 
 # Installing needed packages for installation.
-RUN apt-get install -y --no-install-recommends git wireguard wireguard-tools python3 python3-pip python3-venv iproute2 openresolv procps iptables curl
+RUN apt-get install -y --no-install-recommends git wireguard wireguard-tools python3 python3-pip python3-venv iproute2 openresolv procps iptables curl iputils-ping traceroute
 
 ENV WGDASH=/opt/wireguardashboard
 RUN python3 -m venv ${WGDASH}/venv

docker/compose.yaml

@@ -4,6 +4,7 @@ services:
     restart: unless-stopped
     container_name: wire-dash
     environment:
+      #- global_dns=8.8.8.8
       #- tz=Europe/Amsterdam # <--- is default
       - public_ip=212.124.66.17
     ports:
@@ -11,8 +12,10 @@ services:
       - 51820:51820/udp
     volumes:
       - wireguard_confs:/etc/wireguard
+      - wireguard_app:/opt/wireguardashboard/app
     cap_add:
       - NET_ADMIN
 
 volumes:
   wireguard_confs:
+  wireguard_app:

docker/entrypoint.sh

@@ -1,4 +1,7 @@
-echo "Starting the WireGuard Dashboard."
+echo "\nStarting the WireGuard Dashboard."
+
+# Cleaning out previous data such as the .pid file.
+rm /opt/wireguardashboard/app/src/gunicorn.pid
 
 # Starting the WireGuard Dashboard Web-UI.
 . ${WGDASH}/venv/bin/activate
@@ -23,7 +26,7 @@ else
 fi
 
 sleep 3s
-tail -f /opt/wireguardashboard/app/src/log/*.log
+tail -f $(ls -t /opt/wireguardashboard/app/src/log/error_*.log | head -n 1)
 
 # Blocking command in case of erroring.
 sleep infinity