added Docker host in case TCP is used instead of Unix socket

.gitignore

@@ -1 +1,2 @@
 /.env
+/docker-compose.override.yml

docker-compose.yml

@@ -5,11 +5,13 @@ services:
     image: ngoduykhanh/powerdns-admin:${PDA_VERSION}
     restart: always
     environment:
-      - SQLALCHEMY_DATABASE_URI=mysql://${MYSQL_USER}:${MYSQL_PASS}@host.docker.internal/${MYSQL_DBNAME}
+      - SQLALCHEMY_DATABASE_URI=${PDA_DBURI}
       - GUNICORN_TIMEOUT=60
       - GUNICORN_WORKERS=2
       - GUNICORN_LOGLEVEL=INFO
       - OFFLINE_MODE=False
+    extra_hosts:
+      - host.docker.internal:host-gateway
     labels:
       - traefik.enable=${TRAEFIK_ENABLED}
       - traefik.docker.network=traefik

example.env

@@ -1,8 +1,6 @@
 # PowerDNS-Admin
-PDA_VERSION==0.2.4
-MYSQL_DBNAME=pdns
-MYSQL_USER=pdns
-MYSQL_PASS=changeme
+PDA_VERSION=0.2.4
+PDA_DBURI=mysql://pdns:changeme@host.docker.internal/pdns
 
 # Træfik
 TRAEFIK_CERTRESOLVER=letsencrypt