Feature/182 setup actions (#186)

* Create scripts

* Create github workflows

* Create initial DB migration script

* Make default bot prefix configurable

* Add bot token fetcher

docker-compose.stage.yml

@@ -0,0 +1,31 @@
+version: "3.9"
+
+volumes:
+  stage_database_data:
+
+services:
+  # discord:
+  #   build: .
+
+  database:
+    image: mysql/mysql-server
+    command: --default-authentication-plugin=mysql_native_password
+    restart: always
+    environment:
+      - MYSQL_DATABASE=vylbot
+      - MYSQL_USER=stage
+      - MYSQL_PASSWORD=stage
+      - MYSQL_ROOT_PASSWORD=root
+      - MYSQL_ROOT_HOST=0.0.0.0
+    ports:
+      - "3111:3306"
+    volumes:
+      - stage_database_data:/var/lib/mysql
+
+  phpmyadmin:
+    image: phpmyadmin
+    restart: always
+    ports:
+      - "3112:80"
+    environment:
+      - PMA_ARBITRARY=1