fix: date calculations cause failed tests

Fix #81

docker/Dockerfile

@@ -62,7 +62,7 @@ RUN apk add --no-cache \
         bash \
     && docker-php-ext-configure gd --with-freetype --with-jpeg \
     && docker-php-ext-install -j$(nproc) \
-        gd pgsql zip pdo_mysql mysqli intl 
+        gd pgsql zip pdo_mysql pdo_pgsql mysqli intl 
 
 # Remove default nginx config
 RUN rm -rf /var/www/html \

tests/DailyChangeTest.php

@@ -221,7 +221,7 @@ class DailyChangeTest extends TestCase
         $second_transaction = Transaction::create([
             'symbol' => 'AAPL',
             'portfolio_id' => $portfolio->id,
-            'date' => now()->subYears(3),
+            'date' => now()->subDays(1080), // 3 years
             'quantity' => 1,
             'cost_basis' => 39.89,
             'transaction_type' => 'BUY',