Move code into new component package

This commit cleans up the resources in the 'embed' package, and instead
moves them into subpackages of a new 'compose' package. This makes sure
that '.env' templates and docker compose contexts are located in the
same location.

embed/resources/compose/sql/docker-compose.yml

@@ -1,35 +0,0 @@
-version: "3.7"
-
-services:
-    sql:
-        image: mariadb
-        volumes:
-            - "./data/:/var/lib/mysql"
-        ports:
-            - 127.0.0.1:3306:3306
-        environment:
-            # This combination of environment variables will configure a passwordless root user
-            # that can only connect to the container from 'localhost'.
-            # This means we can only connect using 'docker-compose exec sql mysql -C '...' '. 
-            - "MYSQL_ALLOW_EMPTY_PASSWORD=yes"
-            - "MYSQL_ROOT_HOST=localhost"
-        restart: always
-    phpmyadmin:
-        image: phpmyadmin/phpmyadmin
-        environment:
-            - "PMA_HOST=sql"
-            - "HIDE_PHP_VERSION=true"
-            - "UPLOAD_LIMIT=100M"
-        # phpmyadmin running on localhost:8080 so that we can easily access the system graphically. 
-        # By default no admin account is created, so initial shell access to make one is needed. 
-        ports:
-            - 127.0.0.1:8080:80
-        depends_on:
-            - sql
-        restart: always
-
-
-networks:
-    default:
-        name: distillery
-        external: true