refactor: use healthcheck for db, remove psql client from image (#737)

* refactor: use healthcheck for db, remove postgresql client from main image

* fix: redis dependency condition

* cleanup entrypoint.sh

* fix healthcheck command

docker-compose.yml

@@ -7,8 +7,10 @@ services:
     ports:
       - '3000:3000'
     depends_on:
-      - postgres
-      - redis
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_started
     environment:
       - HOST=localhost
       - PROTOCOL=http
@@ -49,6 +51,11 @@ services:
       - POSTGRES_PASSWORD=automatisch_password
     volumes:
       - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
   redis:
     image: 'redis:7.0.4'
     volumes: