created an env file to load into context of nodejs when starting server

Dockerfile

@@ -18,6 +18,13 @@ ENV JWT_SECRET=${JWT_SECRET}
 
 WORKDIR /app
 COPY . .
-RUN npm install --force
+RUN npm install --force --omit=dev && \
+    echo "DATABASE_URL=${DATABASE_URL}" >> .env && \
+    echo "DB_HOST=${DB_HOST}" >> .env && \
+    echo "DB_USERNAME=${DB_USERNAME}" >> .env && \
+    echo "DB_PASSWORD=${DB_PASSWORD}" >> .env && \
+    echo "DB_PORT=${DB_PORT}" >> .env && \
+    echo "DB_DATABASE=${DB_DATABASE}" >> .env && \
+    echo "JWT_SECRET=${JWT_SECRET}" >> .env && \
 
-CMD ["node", "src/app.js"]
+CMD ["node", "--env-file=.env", "src/app.js"]

src/config/index.js

@@ -1,12 +1,12 @@
 // config/index.js
 export const database = {
-	host: process.env.DB_HOST || 'localhost',
+	host: process.env.DB_HOST,
-	user: process.env.DB_USER || 'your_db_user',
+	user: process.env.DB_USER,
-	password: process.env.DB_PASSWORD || 'your_db_password',
+	password: process.env.DB_PASSWORD,
-	database: process.env.DB_NAME || 'your_db_name',
+	database: process.env.DB_NAME,
-	port: process.env.DB_PORT || 5432,
+	port: parseInt(process.env.DB_PORT, 10),
 }
 
 export const jwtEnv = {
-	secret: process.env.JWT_SECRET || '',
+	secret: process.env.JWT_SECRET,
 }