Allow more flexible development DB config

.devcontainer/compose.yaml

@@ -7,7 +7,7 @@ services:
       dockerfile: .devcontainer/Dockerfile
 
     volumes:
-    - ../..:/workspaces:cached
+      - ../..:/workspaces:cached
 
     # Overrides default command so things don't shut down after the process ends.
     command: sleep infinity
@@ -18,17 +18,20 @@ services:
     # Use "forwardPorts" in **devcontainer.json** to forward an app port locally.
     # (Adding the "ports" property to this file will not forward from a Codespace.)
     depends_on:
-    - mysql
+      - mysql
+
+    environment:
+      DB_USER: root
 
   mysql:
     image: mariadb:10.6
     restart: unless-stopped
     environment:
-        MYSQL_ALLOW_EMPTY_PASSWORD: 'true'
+      MARIADB_ALLOW_EMPTY_ROOT_PASSWORD: 'true'
     volumes:
-    - mysql-data:/var/lib/mysql
+      - mysql-data:/var/lib/mysql
     networks:
-    - default
+      - default
 
 volumes:
   mysql-data:

config/database.yml

@@ -3,7 +3,7 @@ development:
     adapter: mysql2
     host: <%= ENV.fetch("DB_HOST", "localhost") %>
     database: openneo_impress
-    username: root
+    username: <%= ENV.fetch("DB_USER", ENV.fetch("USER", "root")) %>
     pool: 5
     encoding: utf8mb4
     collation: utf8mb4_unicode_520_ci
@@ -14,7 +14,7 @@ development:
     adapter: mysql2
     host: <%= ENV.fetch("DB_HOST", "localhost") %>
     database: openneo_id
-    username: root
+    username: <%= ENV.fetch("DB_USER", ENV.fetch("USER", "root")) %>
     pool: 2
     variables:
       sql_mode: TRADITIONAL
@@ -25,7 +25,7 @@ test:
     adapter: mysql2
     host: <%= ENV.fetch("DB_HOST", "localhost") %>
     database: openneo_impress_test
-    username: root
+    username: <%= ENV.fetch("DB_USER", ENV.fetch("USER", "root")) %>
     pool: 5
     encoding: utf8mb4
     collation: utf8mb4_unicode_520_ci
@@ -36,7 +36,7 @@ test:
     adapter: mysql2
     host: <%= ENV.fetch("DB_HOST", "localhost") %>
     database: openneo_id_test
-    username: root
+    username: <%= ENV.fetch("DB_USER", ENV.fetch("USER", "root")) %>
     pool: 2
     variables:
       sql_mode: TRADITIONAL