Docker-Compose Apache+PHP+React+MySQL and Laravel - docker

Question

I'm trying to mount a docker-compose with its respective dockerfile to have a project with a /backend/ folder where an API with laravel will go and then a /frontend/ folder where a react frontend goes.
The goal is to build on it so I need to use volumes with persistent data.
The build does it perfectly and I can enter each of the dockers, the problems I have are:
The volumes are not persistent, that is, I make a change in the frontend directory (react) and I don't see the changes, I only see them if I do another build.
From the backend container I want to be able to access the DB to launch the Laravel migrations and I get an error that it can't find the schema.
Docker-compose.yaml
version: '3.7'
services:
frontend:
build:
context: ./app-frontend
ports:
- "81:80"
networks:
- app-network
backend:
build:
context: ./app-backend/
restart: unless-stopped
environment:
MYSQL_DATABASE: ${DB_DATABASE}
MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
MYSQL_PASSWORD: ${DB_PASSWORD}
MYSQL_USER: ${DB_USERNAME}
working_dir: /var/www
volumes:
- ./app-backend:/var/www
ports:
- "8001:8000"
networks:
- app-network
- db
appdb:
image: mysql:5.7
restart: unless-stopped
environment:
MYSQL_DATABASE: ${DB_DATABASE}
MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
MYSQL_PASSWORD: ${DB_PASSWORD}
MYSQL_USER: ${DB_USERNAME}
volumes:
- ./initdb:/docker-entrypoint-initdb.d
ports:
- "3307:3306"
networks:
- db
networks:
app-network:
driver: bridge
db:
Dockerfile backend
FROM php:7.4-apache
RUN a2enmod rewrite
RUN apt-get update && apt-get install -y \
libzip-dev \
zlib1g-dev \
libicu-dev \
libxml2-dev \
libpq-dev \
vim \
libpng-dev \
&& docker-php-ext-install pdo pdo_mysql zip intl xmlrpc soap opcache \
&& docker-php-ext-configure pdo_mysql --with-pdo-mysql=mysqlnd
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
COPY docker/php/https://php.ini /usr/local/etc/php
COPY docker/apache/https://apache2.conf /etc/apache2/https://apache2.conf
COPY docker/apache/https://vhost.conf /etc/apache2/sites-available/000-https://default.conf
ENV COMPOSER_ALLOW_SUPERUSER 1
COPY . /var/www
RUN chown -R www-data:www-data /var/www/html
WORKDIR /var/www
RUN composer install
Dockerfile frontend
FROM node:13.10.1-alpine
WORKDIR /app
COPY . .
RUN npm install
RUN npm run build
ENTRYPOINT npm start