Add Docker and Coolify deployment setup

Add the container configuration, environment templates, and storage settings needed to deploy SPOTA with Docker and Coolify.

.env.example

@@ -0,0 +1,17 @@
+APP_PORT=8080
+APP_URL=http://localhost:8080
+
+DB_HOST=db
+DB_PORT=3307
+DB_USER=spota_user
+DB_PASSWORD=spota_password
+DB_NAME=spota_spotadb
+DB_SPOTA=spota_spotadb
+DB_KONSULTASI=spota_konsultasi
+DB_BIO=spota_spotadb
+DB_DOSEN=spota_spotadb
+SERVICE_DB_NAME=spota_spotadb
+
+MYSQL_ROOT_PASSWORD=root_password
+PHP_DISPLAY_ERRORS=1
+FILES_STORAGE_PATH=/var/www/html/files