Created exercises

- Added endpoint to retrieve the list of exercises

database/seeds/ExerciseSeeder.php

@@ -0,0 +1,27 @@
+<?php
+
+use App\Exercise;
+use Illuminate\Database\Seeder;
+
+class ExerciseSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     *
+     * @return void
+     */
+    public function run()
+    {
+        $exercises = [
+            'BENT OVER HIGH ROWS', 'LOW PULL APARTS', 'BENT OVER LOW ROWS', 'ARCHER PULLS',
+            'PUSH-UP w/ BAND', 'REVERSE GRIP FLYE', 'WRAPAROUND MOST MUSCULAR', 'WRAPAROUND PRESS', 'REVERSE CRUNCHES',
+            'STANDING BICEPS CURLS', 'SINGLE-ARM CONCENTRATION CURLS', 'SINGLE-ARM OVERHEAD EXTENSIONS', 'SINGLE-ARM KICKBACKS',
+            'STANDING SINGLE-ARM PRESS', 'SINGLE-ARM LATERAL RAISE', 'HIGH PULL APARTS', 'FRONT RAISES',
+            'OVERHEAD SQUAT', 'SINGLE LEG SQUAT', 'STIFF LEG DEADLIFT', 'SINGLE LEG CALF RAISE'
+        ];
+
+        foreach ($exercises as $exercise) {
+            Exercise::create(['name' => $exercise]);
+        }
+    }
+}