[day-00] base infra for the project

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+
+[*.{ex,exs,yml}]
+indent_size = 2
+indent_style = space

.tool-versions

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+erlang 24.0.2
+elixir 1.12.1-otp-24

docker-compose.yml

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+---
+version: '3.7'
+services:
+  db:
+    image: 'postgres:13.3-alpine'
+    hostname: &db_host db
+    environment:
+      POSTGRES_USER: &db_user postgres
+      POSTGRES_PASSWORD: &db_pass postgres
+      POSTGRES_DB: &db_name postgres
+    volumes:
+      - './priv/docker/postgres/init.sql:/docker-entrypoint-initdb.d/init.sql'
+      - 'db_data:/var/lib/postgresql/data'
+    restart: unless-stopped
+volumes:
+  db_data: {}

priv/docker/postgres/init.sql

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+CREATE EXTENSION "uuid-ossp";
+CREATE EXTENSION "pg_stat_statements";