Modify Dockerfile

.env.docker.example

+FRONTEND_URL='http://localhost:5173'
+
+COOKIE_PARSER_SECRET='secret'
+JWT_SECRET='secret'
+
+DB_HOST='mysql'
+DB_PORT=3306
+DB_USER='root'
+DB_PASSWORD='12345'
+DB_NAME='collab_space'
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Dockerfile

-FROM node:18
+FROM node:20
 
 LABEL maintainer="Florian Raith"
 
+ENV NODE_ENV=development
+
 WORKDIR /usr/src/app/backend
 
 COPY package*.json ./
 
-RUN npm install
+RUN npm ci
 
 COPY . .
 
-EXPOSE 5173
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+EXPOSE 3000
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