feat(fullstack): Add docker-compose files, improve local development

legalconsenthub-backend/docker-compose.yaml

@@ -1,45 +0,0 @@
-networks:
-  net:
-    driver: bridge
-
-volumes:
-  postgres_data_testbed:
-
-services:
-  db:
-    image: postgres:latest
-    container_name: postgres-testbed
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-      POSTGRES_DB: ${POSTGRES_DB}
-    env_file:
-      - .env
-    ports:
-      - 5532:5432
-    networks:
-      - net
-    volumes:
-      - postgres_data_testbed:/var/lib/postgresql/data
-
-  keycloak:
-    image: quay.io/keycloak/keycloak:26.4.0
-    container_name: keycloak-testbed
-    command: start-dev
-    environment:
-      KC_DB: postgres
-      KC_DB_URL_HOST: db
-      KC_DB_USERNAME: ${POSTGRES_USER}
-      KC_DB_PASSWORD: ${POSTGRES_PASSWORD}
-      KC_DB_DATABASE: ${POSTGRES_DB}
-      KC_DB_SCHEMA: public
-      KC_BOOTSTRAP_ADMIN_USERNAME: ${KEYCLOAK_ADMIN}
-      KC_BOOTSTRAP_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
-    env_file:
-      - .env
-    ports:
-      - 7080:8080
-    depends_on:
-      - db
-    networks:
-      - net