Merge branch 'feature/postgres-password' into 'master'

Postgres password env var

See merge request !3

.env.dist

+POSTGRES_PASSWORD=

.gitignore

 *.iml
 .idea/
+.env

docker-compose.yml

@@ -7,6 +7,8 @@ services:
       - vikoverflow-data:/var/lib/postgresql/data
     ports:
       - '5432:5432'
+    environment:
+      - POSTGRES_PASSWORD
 
   backend:
     build: