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.

component/sql/stack/docker-compose.yml

@@ -0,0 +1,35 @@
+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