diff --git a/config/database.yml.sample b/config/database.yml.sample
new file mode 100644
index 0000000..65568da
--- /dev/null
+++ b/config/database.yml.sample
@@ -0,0 +1,18 @@
+default: &default
+  adapter: postgresql
+  encoding: unicode
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+
+development:
+  <<: *default
+  database: open_stock_development
+
+test:
+  <<: *default
+  database: open_stock_test
+
+production:
+  <<: *default
+  database: open_stock_production
+  username: <%= ENV['OPEN_STOCK_DATABASE_USERNAME'] %>
+  password: <%= ENV['OPEN_STOCK_DATABASE_PASSWORD'] %>
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index 540ba2e..267ae71 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1058,10 +1058,10 @@
   resolved "https://registry.yarnpkg.com/@rails/actioncable/-/actioncable-6.1.5.tgz#c24ec8123a8e7e239ceabda29078df9c93752394"
   integrity sha512-bV4/Q7NweGFm7t3GvUFm19UF2WKmcvlOXy7AxMWEZCwDxQLagAXhUpKb1AJ6Rg88cPHqXSQHaGKr84lIMd607A==
 
-"@rails/activestorage@^6.1.5":
-  version "6.1.5"
-  resolved "https://registry.yarnpkg.com/@rails/activestorage/-/activestorage-6.1.5.tgz#a43929573b2ffae54857ffa3b7ac1988af42b681"
-  integrity sha512-7L0eWqrguZIyvfPOpVoZRChuIgxbpBdwdVtprT6wrl5rUAbdyHr6AZczl1yS+5d6nBV0TqpVLaB1sGxi2aMbCQ==
+"@rails/activestorage@^6.0.0":
+  version "6.1.7"
+  resolved "https://registry.yarnpkg.com/@rails/activestorage/-/activestorage-6.1.7.tgz#5aaae9f4d10800fdb4fd6fe26fd8b4218579c6e3"
+  integrity sha512-h++k8LBLns4O8AqzdaFp1TsCLP9VSc2hgWI37bjzJ+4D995X7Rd8kdkRmXRaNAUlHDJgy6RpnbhBJ5oiIgWTDw==
   dependencies:
     spark-md5 "^3.0.0"
 
@@ -1423,6 +1423,11 @@
     "@webassemblyjs/wast-parser" "1.9.0"
     "@xtuc/long" "4.2.2"
 
+"@webpack-cli/serve@^2.0.5":
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/@webpack-cli/serve/-/serve-2.0.5.tgz#325db42395cd49fe6c14057f9a900e427df8810e"
+  integrity sha512-lqaoKnRYBdo1UgDX8uF24AfGMifWK19TxPmM5FHc2vAGxrJ/qtyUyFBWoY1tISZdelsQ5fBcOusifo5o5wSJxQ==
+
 "@xtuc/ieee754@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@xtuc/ieee754/-/ieee754-1.2.0.tgz#eef014a3145ae477a1cbc00cd1e552336dceb790"