app still wont connect to database...

Dockerfile

@@ -31,6 +31,8 @@ USER node
 # Copy the rest of the source files into the image.
 COPY . .
 
+CMD npm i
+
 # Expose the port that the application listens on.
 EXPOSE 3000
 

backend/db.js

@@ -10,7 +10,7 @@ const db  = new Client({
 });
 
 // create connection to database
-db .connect()
+db.connect()
     .then(() => console.log('Successfully connected to database'))
     .catch((err) => console.log('Error on connecting to database: ', err));
 

backend/socket.js

@@ -4,6 +4,28 @@ const jwtSecret = process.env.JWT_SECRET;
 const { db } = require('./db.js');
 
 function initializeSocket(server) {
+    async function createTables() {
+        await db.query(`
+      CREATE TABLE IF NOT EXISTS accounts (
+        id SERIAL PRIMARY KEY,
+        username VARCHAR(255) UNIQUE NOT NULL,
+        password VARCHAR(255) NOT NULL,
+        email VARCHAR(255) UNIQUE NOT NULL,
+      )
+    `);
+
+        // Create messages table
+        await db.query(`
+      CREATE TABLE IF NOT EXISTS messages (
+        id SERIAL PRIMARY KEY,
+        content TEXT NOT NULL,
+        username VARCHAR(255) NOT NULL,
+        recipient VARCHAR(255) NOT NULL,
+      )
+    `);
+
+    }
+
     const io = new Server(server, {
         cookie: {
             httpOnly: true,

compose.yaml

@@ -1,3 +1,5 @@
+version: '3.8'
+
 services:
   web-chat:
     build:
@@ -5,27 +7,27 @@ services:
     environment:
       NODE_ENV: production
     ports:
-      - 3000:3000
-
+      - "3000:3000"
     depends_on:
-      db:
-        condition: service_healthy
+      - db
+
   db:
-     image: postgres:latest
-     restart: always
-     user: ${PG_USER}
-     volumes:
-       - db-data:/var/lib/postgresql/data
-     environment:
-       - POSTGRES_HOST=${PG_HOST}
-       - POSTGRES_DB=${PG_DATABASE}
-       - POSTGRES_PASSWORD=${PG_PASSWORD}
-     expose:
-       - ${PG_PORT}:5432
-     healthcheck:
-       test: [ "CMD", "pg_isready" ]
-       interval: 10s
-       timeout: 5s
-       retries: 5
+    image: postgres:latest
+    restart: always
+    user: postgres
+    volumes:
+      - db-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_DB: webchat
+      POSTGRES_PASSWORD: jebanechaslo
+    expose:
+      - "5432"
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "${PG_USER}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
 volumes:
-   db-data:
+  db-data: