root: Add docker-compose postgresql and redis healthchecks (#2958)

* Add healthchecks to docker compose

Add healthchecks for postgresql and redis, see als #2519

* bump docker-compose version to 3.4

docker-compose.yml

@@ -1,10 +1,16 @@
 ---
-version: '3.2'
+version: '3.4'
 
 services:
   postgresql:
     image: postgres:12-alpine
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "pg_isready"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 5s
     volumes:
       - database:/var/lib/postgresql/data
     environment:
@@ -16,6 +22,12 @@ services:
   redis:
     image: redis:alpine
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "redis-cli ping | grep PONG"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 3s
   server:
     image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2022.5.2}
     restart: unless-stopped