feat: load app variables from env variables and disable password auth

Author: abhisheksr01

docker-compose.yml

@@ -12,9 +12,8 @@ services:
     ports:
       - "3000:3000"
     environment:
-      - name=postgres
-      - password=secret
       - host=db
+      - name=postgres
       - dbname=postgres
 
   db:
@@ -23,7 +22,7 @@ services:
     environment:
       - POSTGRES_DB=postgres
       - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=secret
+      - POSTGRES_HOST_AUTH_METHOD=trust
     volumes:
       - ./db/:/opt/
       - ./scripts/upload.sh:/opt/upload.sh

rates/config.py

@@ -1,6 +1,6 @@
+import os
 DB = {
-    "name": "postgres",
-    "user": "postgres",
-    "password": "secret",
-    "host": "db"
+    "name": str(os.getenv("name", "postgres")),
+    "user": str(os.getenv("user", "postgres")),
+    "host": str(os.getenv("host", "localhost"))
 }

rates/rates.py

@@ -11,10 +11,9 @@
 def get_db_conn(db_config):
     """ Create a database connection. """
     return psycopg2.connect(
-        "dbname='{}' user='{}' password='{}' host='{}'".format(
+        "dbname='{}' user='{}' host='{}'".format(
             db_config["name"],
             db_config["user"],
-            db_config["password"],
             db_config["host"]
         )
     )

scripts/start.sh

@@ -1,10 +1,13 @@
 #!/usr/bin/env bash
 echo "** Starting the app and db"
 docker compose up -d
+
 echo "** Sleeping for 10 sec to ensure db services are running before uploading dump data"
 sleep 10
+
 echo "** Uploading dump data & then sleeping for 5 sec **"
 docker compose exec db /bin/bash ./opt/upload.sh
 sleep 5
-echo "Performing Health Check on the App"
+
+echo "** Performing Health Check on the App **"
 curl "http://127.0.0.1:3000/"