Don't use old databases in test runs

test-envs/docker-compose-mysql.yml

@@ -5,8 +5,6 @@ services:
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: 1
       MYSQL_DATABASE: ${TRACKS_DB:-tracks}
-    volumes:
-      - db-data:/var/lib/mysql
   web:
     build:
       context: ..
@@ -26,5 +24,3 @@ services:
       - 3000:3000
     depends_on:
       - db
-volumes:
-  db-data:

test-envs/docker-compose-postgres.yml

@@ -5,8 +5,6 @@ services:
     environment:
       POSTGRES_DB: ${DATABASE_NAME:-tracks}
       POSTGRES_PASSWORD: password
-    volumes:
-      - db-data:/var/lib/postgresql/data
   web:
     build:
       context: ..
@@ -29,5 +27,3 @@ services:
       - 3000:3000
     depends_on:
       - db
-volumes:
-  db-data:

test-envs/docker-compose-sqlite.yml

@@ -12,7 +12,7 @@ services:
       DATABASE_NAME: "/app/db/db.sqlite"
       DATABASE_TYPE: sqlite3
     volumes:
-      - ${VOLUME:-sqlite}:/app/db:Z
+      - sqlite:/app/db:Z
       - ${VOLUME:-..}/config/database.docker.yml:/app/config/database.yml:Z
       - ${VOLUME:-..}/config/site.docker.yml:/app/config/site.yml:Z
     ports: