Revisited env variables and removed the unnecessary ones

README.md

@@ -83,4 +83,17 @@ erDiagram
         INTEGER user_id FK
         BOOLEAN adverse_behavior
     }
-```
+```
+
+#### Necessary files to start the database
+
+To connect to the database we need to define a `.env` file in the root of the project. It should contain the following environment variables
+
+```
+DB_PORT=<Database port>
+DB_NAME=<Database name>
+DB_USER=<Database username>
+DB_PASS=<Database password>
+```
+
+Replace the `< ... >` by the correct value. For example: `DB_NAME=<Database name>` --> `DB_NAME=ahbcc`.

cmd/main.go

@@ -30,8 +30,7 @@ func databaseURL() string {
 	dbUser := os.Getenv("POSTGRES_DB_USER")
 	dbPass := os.Getenv("POSTGRES_DB_PASS")
 	dbName := os.Getenv("POSTGRES_DB_NAME")
-	dbHost := os.Getenv("POSTGRES_DB_HOST")
 	dbPort := os.Getenv("POSTGRES_DB_PORT")
 
-	return fmt.Sprintf("user=%s password=%s dbname=%s host=%s port=%s sslmode=disable", dbUser, dbPass, dbName, dbHost, dbPort)
+	return fmt.Sprintf("user=%s password=%s dbname=%s host=postgres_db port=%s sslmode=disable", dbUser, dbPass, dbName, dbPort)
 }

docker-compose.yml

@@ -3,7 +3,6 @@ services:
     build: .
     container_name: app
     environment:
-      POSTGRES_DB_HOST: ${DB_HOST}
       POSTGRES_DB_PORT: ${DB_PORT}
       POSTGRES_DB_NAME: ${DB_NAME}
       POSTGRES_DB_USER: ${DB_USER}
@@ -27,7 +26,7 @@ services:
       POSTGRES_USER: ${DB_USER}
       POSTGRES_PASSWORD: ${DB_PASS}
     ports:
-      - '1234:5432'
+      - '1234:${DB_PORT}'
     volumes:
       - database:/var/lib/postgresql/data
     networks: